# List of Telecommunications companies in the United States

Tamtam tracks 750 Telecommunications companies headquartered in the United States. This list ranks the 100 largest by number of employees on LinkedIn, led by AT&T, Comcast and Spectrum. Their median headcount is 3,390. Half of them were founded in 1993 or later. The most common headquarters are Stamford (5), Dallas (4) and Englewood (3).

These are large telecommunications companies in the United States. They offer a range of services from network provision to entertainment. Examples include AT&T, connecting people with technology, and Comcast, delivering broadband, mobile, and video products. Spectrum provides internet, TV, and mobile services, while T-Mobile is a wireless provider. Verizon Wireless focuses on network, cloud, and security solutions. EchoStar Corporation offers technology and networking services.

A notable pattern is the concentration of these large telecommunications companies in a few key states. For example, several companies, including Spectrum, Charter Communications, and Time Warner Cable, are headquartered in Stamford, Connecticut. Similarly, Englewood, Colorado, is home to both EchoStar Corporation and DISH TV.

🇺🇸 United States · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [AT&T](https://www.tamtam.ai/c/at-and-t) (att.com)<br>Innovative company connecting people with technology to create a seamless, better life through network, products, services, and passionate employees | Telecommunications | 🇺🇸 Dallas | 193,793 |  |
| 2 | [Comcast](https://www.tamtam.ai/c/comcast) (comcast.com)<br>Delivering broadband, mobile, and video products, along with entertainment, sports, news, and theme park experiences; driven by passionate creators and innovators | Telecommunications | 🇺🇸 Philadelphia | 189,000 | 1963 |
| 3 | [Spectrum](https://www.tamtam.ai/c/spectrum-stamford) (spectrum.net)<br>A leading broadband connectivity company offering internet, TV, mobile, voice, and tailored advertising services to residential, business, and government customers | Telecommunications | 🇺🇸 Stamford | 97,651 | 1993 |
| 4 | [T-Mobile](https://www.tamtam.ai/c/t-mobile) (careers.t-mobile.com)<br>Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington | Telecommunications | 🇺🇸 Bellevue | 96,232 |  |
| 5 | [Verizon Wireless](https://www.tamtam.ai/c/verizon-wireless) (verizonwireless.com)<br>This company powers fast and reliable network, offers cloud and security solutions, and leads in IoT and video entertainment | Telecommunications | 🇺🇸 Basking Ridge | 65,405 |  |
| 6 | [Sprint](https://www.tamtam.ai/c/sprint) (t-mobile.com)<br>The company offers T-Mobile® Business Advantage services Connect with T-Mobile For Business to learn more about their offerings | Telecommunications | 🇺🇸 Overland Park | 36,990 | 1899 |
| 7 | [Charter Communications](https://www.tamtam.ai/c/charter-communications) (charter.com)<br>Provider of internet, television, and phone services, delivering innovative telecommunications solutions to residential and business customers nationwide. | Telecommunications | 🇺🇸 Stamford | 33,550 |  |
| 8 | [EchoStar Corporation](https://www.tamtam.ai/c/echostar-corporation) (echostar.com)<br>provider of technology, networking services, television entertainment, and connectivity solutions for consumers, enterprises, operators, and governments worldwide | Telecommunications | 🇺🇸 Englewood | 28,509 | 2008 |
| 9 | [Motorola Solutions](https://www.tamtam.ai/c/motorola-solutions) (motorolasolutions.com)<br>The company builds and connects technologies to enhance public safety collaboration for safer communities, schools, hospitals, and businesses worldwide | Telecommunications | 🇺🇸 Chicago | 28,153 |  |
| 10 | [Cox Communications](https://www.tamtam.ai/c/cox-communications) (cox.com)<br>Provider of broadband applications and services enhancing smart homes and cities, focusing on connectivity, comfort, security, and entertainment. | Telecommunications | 🇺🇸 Atlanta | 16,351 | 1964 |
| 11 | [Time Warner Cable](https://www.tamtam.ai/c/time-warner-cable) (jobs.spectrum.com)<br>A leading TV, internet, and voice provider, focused on growth and exceptional service Visit our LinkedIn and policy page for more information | Telecommunications | 🇺🇸 Stamford | 16,207 |  |
| 12 | [DISH TV](https://www.tamtam.ai/c/dish-tv) (echostar.com)<br>Providing TV entertainment services focusing on rural areas and offering streaming options to expand consumer choice in entertainment. | Telecommunications | 🇺🇸 Englewood | 14,638 |  |
| 13 | [Frontier Internet](https://www.tamtam.ai/c/frontier-internet) (frontier.com)<br>Largest pure-play fiber provider in the U.S., delivering blazing-fast broadband connectivity to millions of consumers and businesses nationwide. | Telecommunications | 🇺🇸 Dallas | 12,461 | 1935 |
| 14 | [ACN](https://www.tamtam.ai/c/acn-concord) (acn.com)<br>A global direct selling company offering essential telecommunications services and products, with a commitment to giving back through charity efforts | Telecommunications | 🇺🇸 Concord | 11,639 | 1993 |
| 15 | [Ciena](https://www.tamtam.ai/c/ciena) (ciena.com)<br>Global leader in optical and routing systems, services, and automation software, building adaptive networks to meet digital demands with innovation and collaboration | Telecommunications | 🇺🇸 Hanover | 10,652 | 1992 |
| 16 | [CenturyLink (Formerly Qwest)](https://www.tamtam.ai/c/centurylink-formerly-qwest) (centurylink.com)<br>A leading US communications provider offering reliable and secure networking solutions, helping businesses manage network and IT complexity with cyber security solutions | Telecommunications | 🇺🇸 Monroe | 10,250 | 1930 |
| 17 | [CommScope](https://www.tamtam.ai/c/commscope) (commscope.com)<br>Innovating wired and wireless network technology to empower customers to anticipate and create cutting-edge solutions for the future | Telecommunications | 🇺🇸 Claremont | 10,198 | 1976 |
| 18 | [Comcast Business](https://www.tamtam.ai/c/comcast-business) (business.comcast.com)<br>A technology solutions provider offering connectivity, networking, cybersecurity, and communications solutions to businesses of all sizes, with a focus on driving innovation and growth | Telecommunications | 🇺🇸 Philadelphia | 9,292 |  |
| 19 | [Netcracker Technology](https://www.tamtam.ai/c/netcracker-technology) (netcracker.com)<br>It is a software company providing critical solutions for service providers, focusing on digital transformation and cloud opportunities worldwide. | Telecommunications | 🇺🇸 Waltham | 8,935 | 1993 |
| 20 | [Cricket Wireless](https://www.tamtam.ai/c/cricket-wireless) (cricketwireless.com)<br>The company provides easy, high-quality, and affordable wireless services, fostering a culture of growth, inclusivity, and career advancement opportunities | Telecommunications | 🇺🇸 Atlanta | 8,811 | 1999 |
| 21 | [Uniti Group Inc.](https://www.tamtam.ai/c/uniti-group-inc) (uniti.com)<br>A real estate investment trust focused on acquiring and constructing critical communications infrastructure, including fiber, towers, and leasing assets for wireless and telecom industries | Telecommunications | 🇺🇸 Little Rock | 8,488 | 2015 |
| 22 | [Windstream](https://www.tamtam.ai/c/windstream) (uniti.com)<br>Announcement of merger between Windstream and Uniti, directing followers to Uniti Group, Inc. for future updates and information. | Telecommunications | 🇺🇸 Little Rock | 8,376 | 2006 |
| 23 | [Optimum](https://www.tamtam.ai/c/optimum-queens) (optimum.com)<br>Optimum, a brand of Altice USA, offers reliable internet service with Optimum Mobile on America's largest 5G network and up to 8 Gig Fiber Internet speeds | Telecommunications | 🇺🇸 Queens | 8,331 |  |
| 24 | [CTDI](https://www.tamtam.ai/c/ctdi) (linktr.ee)<br>A global engineering and logistics company founded in 1975, specializing in repair, refurbishment, and logistics services for the communications industry | Telecommunications | 🇺🇸 West Chester | 7,614 | 1975 |
| 25 | [Cable One/Sparklight Careers](https://www.tamtam.ai/c/cable-one-sparklight-careers) (sparklight.com)<br>This company provides scalable, reliable business solutions including high-speed internet, phone service, cable TV, and fiber-optic options for success | Telecommunications | 🇺🇸 Phoenix | 7,156 | 1983 |
| 26 | [Viasat](https://www.tamtam.ai/c/viasat) (viasat.com)<br>Global communications company providing connectivity solutions for consumers, businesses, governments, and militaries worldwide, ensuring internet access in remote locations and on-the-go | Telecommunications | 🇺🇸 Carlsbad | 6,809 | 1986 |
| 27 | [Spectrum Business](https://www.tamtam.ai/c/spectrum-business) (spectrum.com)<br>Provider of fast and reliable internet, phone, and mobile services tailored for small businesses, ensuring seamless communication and connectivity | Telecommunications | 🇺🇸 Stamford | 6,774 |  |
| 28 | [Altice USA](https://www.tamtam.ai/c/altice-usa) (alticeusa.com)<br>Provider of high-speed broadband, mobile, entertainment, voice services, local news content, and advanced advertising across 21 states. | Telecommunications | 🇺🇸 Queens | 6,646 |  |
| 29 | [Liberty Latin America](https://www.tamtam.ai/c/liberty-latin-america) (lla.com)<br>A leading telecommunications company in Latin America and the Caribbean offering triple-play and quad-play services, enterprise connectivity, fiber optic network, and IT solutions | Telecommunications | 🇺🇸 Denver | 6,564 |  |
| 30 | [Boost Mobile](https://www.tamtam.ai/c/boost-mobile) (dish.com)<br>A nationwide wireless provider offering affordable, reliable service to diverse communities, constantly improving their network to deliver value to customers | Telecommunications | 🇺🇸 Littleton | 6,382 |  |
| 31 | [American Tower](https://www.tamtam.ai/c/american-tower) (americantower.com)<br>Global provider of digital infrastructure supporting mobile and broadband networks, enabling connectivity, innovation, and bridging digital divides worldwide. | Telecommunications | 🇺🇸 Boston | 6,111 | 1995 |
| 32 | [UScellular](https://www.tamtam.ai/c/uscellular) (uscellular.com)<br>A leading wireless carrier empowering employees to make a positive impact on customers and communities, with a focus on career advancement and a supportive culture | Telecommunications | 🇺🇸 Chicago | 6,067 |  |
| 33 | [Metro by T-Mobile](https://www.tamtam.ai/c/metro-by-t-mobile) (metrobyt-mobile.com)<br>The company provides simple and affordable connected solutions for prepaid consumers, prioritizing customer needs with flexible, affordable, and transparent wireless services | Telecommunications | 🇺🇸 Dallas | 6,055 | 1994 |
| 34 | [Cellular Sales](https://www.tamtam.ai/c/cellular-sales) (ow.ly)<br>This company is a premier Verizon retailer selling smartphones, tablets, and accessories, with a focus on excellent customer service and team growth | Telecommunications | 🇺🇸 Knoxville | 5,959 | 1993 |
| 35 | [PT (Performance Technologies, Inc.)](https://www.tamtam.ai/c/pt-performance-technologies-inc) (pt.com)<br>Global supplier of advanced network solutions offering signaling systems for telecom networks and gateways for IP interworking in various industries | Telecommunications | 🇺🇸 Rochester | 5,805 | 1981 |
| 36 | [Spectrum Enterprise](https://www.tamtam.ai/c/spectrum-enterprise) (spectrum.com)<br>A national provider of scalable, fiber-based technology solutions for businesses and communications service providers, offering Internet, Ethernet, Voice, TV, and Managed IT solutions | Telecommunications | 🇺🇸 Stamford | 5,583 |  |
| 37 | [VIAVI Solutions](https://www.tamtam.ai/c/viavi-solutions) (viavisolutions.com)<br>Provides network and service enablement technologies along with optical security products for mobile operators, governments, enterprises, and contractors. | Telecommunications | 🇺🇸 Chandler | 5,055 |  |
| 38 | [BSNL LTD](https://www.tamtam.ai/c/bsnl-ltd) (onlinecareer360.com)<br>A retail company located in Bristol, UK, specializing in various products and services for consumers | Telecommunications | 🇺🇸 Bristol | 4,480 |  |
| 39 | [Zayo Group](https://www.tamtam.ai/c/zayo-group) (zayo.com)<br>provides extensive fiber network connectivity and tailored edge solutions powering carriers, cloud providers, data centers, educational institutions, and enterprises | Telecommunications | 🇺🇸 Denver | 4,478 | 2007 |
| 40 | [Victra - Verizon Authorized Retailer](https://www.tamtam.ai/c/victra-verizon-authorized-retailer) (victra.com)<br>A mobile technology company headquartered in North Carolina, empowering customers with expert solutions, memorable experiences, and long-term support across the US | Telecommunications | 🇺🇸 Raleigh | 4,207 | 1996 |
| 41 | [Ribbon Communications](https://www.tamtam.ai/c/ribbon-communications) (ribboncommunications.com)<br>Provides communications software, IP and optical networking solutions for service providers, enterprises, and critical infrastructure with modern, scalable, and secure technologies. | Telecommunications | 🇺🇸 Plano | 4,092 |  |
| 42 | [Crown Castle](https://www.tamtam.ai/c/crown-castle) (crowncastle.com)<br>Build and maintain wireless infrastructure including towers, small cells, and fiber to support data, technology, and wireless services nationwide. | Telecommunications | 🇺🇸 Houston | 4,086 | 1994 |
| 43 | [TDS®](https://www.tamtam.ai/c/tds-madison) (tdsinc.com)<br>Provides broadband internet, TV, phone services, wireless infrastructure leasing, and marketing solutions to urban, suburban, and rural U.S. communities. | Telecommunications | 🇺🇸 Madison | 3,980 | 1969 |
| 44 | [Xfinity](https://www.tamtam.ai/c/xfinity) (xfinity.com)<br>Revolutionizing connectivity with the Xfinity 10G Network, leading the way into the future of high-speed internet services | Telecommunications | 🇺🇸 Philadelphia | 3,979 |  |
| 45 | [GTT](https://www.tamtam.ai/c/gtt-arlington) (gtt.net)<br>Global managed network and security services provider offering advanced cloud, networking, and security solutions with professional services and exceptional support worldwide | Telecommunications | 🇺🇸 Arlington | 3,917 |  |
| 46 | [CCI](https://www.tamtam.ai/c/cci) (cciproducts.com)<br>A leading provider of base station enhancement products for optimizing service provider investments in capacity expansion and coverage enhancement | Telecommunications | 🇺🇸 South Hackensack | 3,881 | 1996 |
| 47 | [MetroPCS](https://www.tamtam.ai/c/metropcs) (metrobyt-mobile.com)<br>A wireless provider offering trade-off free all-unlimited plans with added value such as Amazon Prime and Google One, using advanced T-Mobile network | Telecommunications | 🇺🇸 Bellevue | 3,711 | 1994 |
| 48 | [AFL](https://www.tamtam.ai/c/afl) (aflglobal.com)<br>A global manufacturer offering end-to-end solutions in fiber optic technology for energy, service provider, enterprise, and industrial markets in over 130 countries | Telecommunications | 🇺🇸 Duncan | 3,658 |  |
| 49 | [MasTec Communications Group](https://www.tamtam.ai/c/mastec-communications-group) (mastec.com)<br>A telecommunications infrastructure services division offering end-to-end solutions for Telecom operators, specializing in 5G, LTE, private LTE, and small cells | Telecommunications | 🇺🇸 Coral Gables | 3,462 | 2003 |
| 50 | [Brightstar Corp.](https://www.tamtam.ai/c/brightstar-corp) (likewize.com)<br>A global leader in device lifecycle management solutions, providing services from purchase to recycling for mobile devices worldwide | Telecommunications | 🇺🇸 Miami | 3,390 | 1997 |
| 51 | [Hughes](https://www.tamtam.ai/c/hughes) (hughes.com)<br>Provides broadband equipment, services, and network operations to millions of consumers, businesses, and governments worldwide via satellite and multi-transport technologies. | Telecommunications | 🇺🇸 Germantown | 3,209 | 1971 |
| 52 | [Cablevision](https://www.tamtam.ai/c/cablevision) (linkedin.com)<br>A telecommunications company formerly known as Cablevision, now operating as Altice USA Follow us on LinkedIn for updates and news | Telecommunications | 🇺🇸 Bethpage | 3,179 |  |
| 53 | [Sorenson Communications](https://www.tamtam.ai/c/sorenson-communications) (sorenson.com)<br>Providing assistive technology and human-centric communication services including captioning, interpreting, translation, and transcription to enhance accessibility and inclusion. | Telecommunications | 🇺🇸 Salt Lake City | 3,152 | 2003 |
| 54 | [Poly](https://www.tamtam.ai/c/poly) (poly.com)<br>This company provides premium audio and video products as part of HP's hybrid work solutions for optimal meetings anytime, anywhere | Telecommunications | 🇺🇸 Santa Cruz | 3,136 |  |
| 55 | [Tigo Bolivia](https://www.tamtam.ai/c/tigo-bolivia) (tigo.com.bo)<br>Digital infrastructure provider in Bolivia offering mobile and high-speed internet, TV subscriptions, entertainment content, and corporate services to connect, improve lives, and develop communities | Telecommunications | 🇺🇸 Santa Cruz | 3,121 | 1990 |
| 56 | [TDS Telecommunications LLC](https://www.tamtam.ai/c/tds-telecommunications-llc) (tdstelecom.com)<br>Provides high-speed internet, TV entertainment, phone services, VoIP solutions, and data networking to urban, suburban, and rural communities. | Telecommunications | 🇺🇸 Madison | 2,985 | 1969 |
| 57 | [Pearce Services](https://www.tamtam.ai/c/pearce-services) (pearce-services.com)<br>Provider of repair, maintenance, and engineering services for critical infrastructure in renewable energy, power generation, and telecom industries, with tech-enabled solutions nationwide | Telecommunications | 🇺🇸 Paso Robles | 2,961 |  |
| 58 | [ADC](https://www.tamtam.ai/c/adc) (adc.com)<br>This company supplies network equipment, software solutions, and integration services for broadband networks transmitting data, video, and voice communications | Telecommunications | 🇺🇸 Eden Prairie | 2,903 | 1935 |
| 59 | [Cogent Communications](https://www.tamtam.ai/c/cogent-communications) (cogentco.com)<br>Provides high-quality Internet, Ethernet, and Colocation services to enterprises worldwide through a vast all-optical IP network. | Telecommunications | 🇺🇸 Washington | 2,890 | 1999 |
| 60 | [ETECSA_Cuba](https://www.tamtam.ai/c/etecsa-cuba) (etecsa.cu)<br>A telecommunications company in Cuba offering services to improve quality of life, support the country's development, and prioritize social responsibility | Telecommunications | 🇺🇸 Av 3ra Miramar | 2,837 | 1994 |
| 61 | [LCC - A Tech Mahindra Company](https://www.tamtam.ai/c/lcc-a-tech-mahindra-company) (lcc.com)<br>A pioneer since 1983, providing network services globally for telecom operators with a focus on innovation, consultancy, and managed services | Telecommunications | 🇺🇸 McLean | 2,770 | 1983 |
| 62 | [Sonic](https://www.tamtam.ai/c/sonic-santa-rosa) (sonic.com)<br>A leading ISP in California providing fast, reliable internet and phone service for businesses and homes since 1994 Known for prioritizing customer care and online privacy rights | Telecommunications | 🇺🇸 Santa Rosa | 2,751 | 1994 |
| 63 | [Metronet](https://www.tamtam.ai/c/metronet) (metronet.com)<br>A fast-growing telecommunication company offering cutting-edge fiber-optic technology for TV, voice, and internet services, focused on customer care and innovation | Telecommunications | 🇺🇸 Evansville | 2,737 | 2005 |
| 64 | [Integra](https://www.tamtam.ai/c/integra-vancouver) (allstream.com)<br>A leader in business communications offering voice, collaboration, connectivity, and managed IT services to help customers innovate and reach business goals | Telecommunications | 🇺🇸 Vancouver | 2,709 | 1846 |
| 65 | [Login](https://www.tamtam.ai/c/login) (loginbusiness.com)<br>Arizona-based provider of business phone service, internet access, and secure data storage solutions Fully licensed and accredited by AZ ROC | Telecommunications | 🇺🇸 Tucson | 2,708 | 2001 |
| 66 | [Mediacom Communications](https://www.tamtam.ai/c/mediacom-communications) (mediacomcable.com)<br>Provides video, high-speed data, phone, home security, automation, broadband solutions, advertising, and production services to households and businesses. | Telecommunications | 🇺🇸 Mediacom Park | 2,495 | 1995 |
| 67 | [eir Ireland](https://www.tamtam.ai/c/eir-ireland) (eir.ie)<br>Leading provider of telecommunications services in Ireland with a large network, offering voice, data, broadband, TV, and 5G services to residential, business, and government markets | Telecommunications | 🇺🇸 Dublin 24 | 2,485 | 1984 |
| 68 | [Adtran](https://www.tamtam.ai/c/adtran) (adtran.com)<br>Innovative solutions for telecommunication service providers to deliver voice, data, and video services, aiming to connect everyone, everywhere in a fully connected world | Telecommunications | 🇺🇸 Huntsville | 2,438 | 1985 |
| 69 | [IES Communications](https://www.tamtam.ai/c/ies-communications) (iescomm.com)<br>Provides next-generation information transport systems including data center design, network hardware, cabling infrastructure, audiovisual, security, and life safety system installations. | Telecommunications | 🇺🇸 Tempe | 2,363 | 1984 |
| 70 | [WOW! Internet, TV, & Phone](https://www.tamtam.ai/c/wow-internet-tv-and-phone) (wowforbusiness.com)<br>A leading broadband provider offering fast, reliable Internet, TV, and phone services for residential and business customers across multiple states | Telecommunications | 🇺🇸 Englewood | 2,325 | 1996 |
| 71 | [Brightspeed](https://www.tamtam.ai/c/brightspeed) (brightspeed.com)<br>A new internet provider expanding connectivity across America with fast, reliable internet for streaming, gaming, and work in millions of homes | Telecommunications | 🇺🇸 Charlotte | 2,311 | 2022 |
| 72 | [Congruex](https://www.tamtam.ai/c/congruex) (congruex.com)<br>A leading provider of end-to-end network design and build services, enabling modern world operations and facilitating connectivity across various sectors | Telecommunications | 🇺🇸 Boulder | 2,291 | 2017 |
| 73 | [altafiber](https://www.tamtam.ai/c/altafiber) (altafiber.com)<br>A company with a history of serving communities through innovation is now focused on expanding fiber access to connect more people and businesses | Telecommunications | 🇺🇸 Cincinnati | 2,273 |  |
| 74 | [Suddenlink Communications](https://www.tamtam.ai/c/suddenlink-communications) (optimum.com)<br>The company is a leading cable operator in the US, providing information, communication, and entertainment services to residential and commercial customers in multiple states | Telecommunications | 🇺🇸 St. Louis | 2,260 | 2003 |
| 75 | [Granite Telecommunications](https://www.tamtam.ai/c/granite-telecommunications) (granitenet.com)<br>A dynamic and rapidly growing company in the telecommunications market, providing high quality, cost-effective solutions to exceed customer expectations | Telecommunications | 🇺🇸 Quincy | 2,254 | 2002 |
| 76 | [Consumer Cellular, Inc.](https://www.tamtam.ai/c/consumer-cellular-inc) (consumercellular.com)<br>Provides no-contract cellphones and service plans, primarily to individuals aged 50-plus, utilizing a nationwide network and sold at major retailers. | Telecommunications | 🇺🇸 Scottsdale | 2,226 | 1995 |
| 77 | [ARRIS](https://www.tamtam.ai/c/arris) (commscope.com)<br>This company provides leading hardware, software, and services to transform how people and businesses stay informed, entertained, and connected in a smart, connected world | Telecommunications | 🇺🇸 Suwanee | 2,219 | 1995 |
| 78 | [Federal Communications Commission](https://www.tamtam.ai/c/federal-communications-commission) (fcc.gov)<br>Independent U.S. government agency regulating interstate and international communications via radio, television, wire, satellite, and cable services. | Telecommunications | 🇺🇸 Washington | 2,207 | 1934 |
| 79 | [SBA Communications](https://www.tamtam.ai/c/sba-communications) (sbasite.com)<br>A leading owner and operator of wireless communications infrastructure, including towers, buildings, rooftops, distributed antenna systems, and small cells across the Americas, Africa, and Asia | Telecommunications | 🇺🇸 Boca Raton | 2,189 | 1989 |
| 80 | [Bright House Networks](https://www.tamtam.ai/c/bright-house-networks) (brighthouse.com)<br>A leading cable systems operator in the US, offering video, high-speed data, home security, business solutions, and targeted advertising services | Telecommunications | 🇺🇸 Syracuse | 2,132 |  |
| 81 | [Transaction Network Services (TNS)](https://www.tamtam.ai/c/transaction-network-services-tns) (tnsi.com)<br>A global provider of Infrastructure-as-a-Service solutions for financial, communications, and payments markets, supporting secure, flexible, and efficient interactions worldwide | Telecommunications | 🇺🇸 Reston | 2,076 | 1990 |
| 82 | [Vistance Networks](https://www.tamtam.ai/c/vistance-networks) (vistancenetworks.com)<br>Provides reliable communication technology solutions focused on performance, innovation, and customer-driven value for a dynamic global market. | Telecommunications | 🇺🇸 Richardson | 2,068 |  |
| 83 | [Polycom](https://www.tamtam.ai/c/polycom) (hp.com)<br>Poly offers a range of smart communication endpoints, cloud software, and services to facilitate authentic human connection and collaboration | Telecommunications | 🇺🇸 San Jose | 2,008 | 1990 |
| 84 | [Ceragon Networks](https://www.tamtam.ai/c/ceragon-networks) (ceragon.com)<br>Global leader in 5G wireless transport solutions, providing innovative backhaul and fronthaul services for operators worldwide, increasing efficiency and enhancing customer experience | Telecommunications | 🇺🇸 Richardson | 1,990 | 1996 |
| 85 | [Mobileum](https://www.tamtam.ai/c/mobileum) (mobileum.com)<br>A leading provider of telecom analytics and testing solutions for roaming, security, risk management to increase revenues, improve network security, and reduce costs | Telecommunications | 🇺🇸 Cupertino | 1,970 |  |
| 86 | [Infinera](https://www.tamtam.ai/c/infinera) (nokia.com)<br>Revolutionizing telecommunications networks worldwide with innovative connectivity solutions, advanced optical technology, automation software, and professional services for global customers | Telecommunications | 🇺🇸 San Jose | 1,960 | 2000 |
| 87 | [DSI](https://www.tamtam.ai/c/dsi-dallas) (dsisystemsinc.com)<br>Sales enablement partner specializing in consumer and commercial indirect dealer sales, offering sales management, training, marketing, software solutions, engineering, and logistics support | Telecommunications | 🇺🇸 Dallas | 1,903 | 1984 |
| 88 | [Ooredoo Kuwait](https://www.tamtam.ai/c/ooredoo-kuwait) (ooredoo.com.kw)<br>Leading international telecom company offering mobile, fixed, broadband internet, and corporate managed services across Middle East, North Africa, and Southeast Asia. | Telecommunications | 🇺🇸 Tel: (965) 1805555 | 1,885 | 1999 |
| 89 | [GCI Communication Corp.](https://www.tamtam.ai/c/gci-communication-corp) (gci.com)<br>Telecommunications provider serving over 200 Alaskan communities with fiber optic, satellite, and microwave networks, supporting healthcare, education, enterprise, and residential customers. | Telecommunications | 🇺🇸 Anchorage | 1,839 | 1979 |
| 90 | [Cable & Wireless Communications](https://www.tamtam.ai/c/cable-and-wireless-communications) (cwc.com)<br>Leading telecommunications and entertainment provider in Caribbean and Latin America offering broadband, mobile, landline, video, and secure IT services. | Telecommunications | 🇺🇸 Miami | 1,832 |  |
| 91 | [Spirent Communications](https://www.tamtam.ai/c/spirent-communications) (spirent.com)<br>Provide innovative testing, assurance, and automation solutions for wireless, positioning, 5G, cloud, and autonomous vehicle technologies. | Telecommunications | 🇺🇸 Santa Clara | 1,755 | 1936 |
| 92 | [Radisys](https://www.tamtam.ai/c/radisys) (radisys.com)<br>Global leader in open telecom solutions, empowering service providers with innovative technology solutions for business transformation in the telecom industry | Telecommunications | 🇺🇸 Hillsboro | 1,753 | 1987 |
| 93 | [Finisar Corporation](https://www.tamtam.ai/c/finisar-corporation) (coherent.com)<br>Follow us at the provided link for updates and information about our rebranding as Coherent Corp Exciting changes ahead! | Telecommunications | 🇺🇸 Sunnyvale | 1,709 |  |
| 94 | [C Spire](https://www.tamtam.ai/c/c-spire) (cspire.com)<br>A technology provider offering ultra-fast 5G wireless services, high-speed fiber internet, and cutting-edge business solutions to enhance the user experience Apply now | Telecommunications | 🇺🇸 Ridgeland | 1,671 | 1988 |
| 95 | [Nokia Bell Labs](https://www.tamtam.ai/c/nokia-bell-labs) (bell-labs.com)<br>Nokia Bell Labs pioneers innovative and sustainable technologies through collaborative research, solving complex scientific challenges for societal impact | Telecommunications | 🇺🇸 Murray Hill | 1,643 | 1925 |
| 96 | [Harmonic](https://www.tamtam.ai/c/harmonic) (harmonicinc.com)<br>Industry leader in video, broadband, and media solutions Specializing in cloud streaming, software as a service, and enabling content delivery to all screens | Telecommunications | 🇺🇸 San Jose | 1,612 |  |
| 97 | [Hotwire Communications Ltd](https://www.tamtam.ai/c/hotwire-communications-ltd) (hotwirecommunications.com)<br>Provider of customized fiber optic telecommunications services for residential, commercial, hospitality, and campus environments, offering high-speed internet, TV, and phone solutions | Telecommunications | 🇺🇸 Fort Lauderdale | 1,586 | 2002 |
| 98 | [Globe Telecommunications, Inc.](https://www.tamtam.ai/c/globe-telecommunications-inc)<br>A telecommunications company based in Newnan, GA, providing communication services to customers in the United States | Telecommunications | 🇺🇸 Newnan | 1,557 |  |
| 99 | [ECI Telecom](https://www.tamtam.ai/c/eci-telecom) (rbbn.com)<br>Global communications software and network solutions provider for service providers, enterprises, and critical infrastructure sectors, offering innovative end-to-end solutions for modernizing networks | Telecommunications | 🇺🇸 Plano | 1,513 | 1961 |
| 100 | [Universal Service Administrative Co. (USAC)](https://www.tamtam.ai/c/universal-service-administrative-co-usac) (usac.org)<br>A company dedicated to achieving universal high-speed connectivity in the United States through various programs and offering competitive employee benefits | Telecommunications | 🇺🇸 Washington | 1,511 | 1997 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in the United States

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,975)
- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,079)
- [Retail chains in the United States](https://www.tamtam.ai/l/retail-chains-united-states) (6,981)
- [Financial services firms in the United States](https://www.tamtam.ai/l/financial-services-firms-united-states) (6,864)
- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,796)
- [IT Services and IT Consulting companies in the United States](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-states) (6,694)
- [SaaS companies in the United States](https://www.tamtam.ai/l/saas-companies-united-states) (6,410)
- [IT services companies in the United States](https://www.tamtam.ai/l/it-services-companies-united-states) (5,818)
- [Healthcare providers in the United States](https://www.tamtam.ai/l/healthcare-providers-united-states) (5,810)
- [Critical infrastructure operators in the United States](https://www.tamtam.ai/l/critical-infrastructure-operators-united-states) (5,801)
- [Hospitals and Health Care companies in the United States](https://www.tamtam.ai/l/hospitals-and-health-care-companies-united-states) (5,573)
- [Hardware manufacturers in the United States](https://www.tamtam.ai/l/hardware-companies-united-states) (5,346)
- [Software Development companies in the United States](https://www.tamtam.ai/l/software-development-companies-united-states) (5,311)
- [Financial Services companies in the United States](https://www.tamtam.ai/l/financial-services-companies-united-states) (5,012)
- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,382)
- [AI companies in the United States](https://www.tamtam.ai/l/ai-companies-united-states) (4,246)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,149)
- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Real Estate companies in the United States](https://www.tamtam.ai/l/real-estate-companies-united-states) (3,808)
- [Higher Education companies in the United States](https://www.tamtam.ai/l/higher-education-companies-united-states) (3,470)
- [Construction companies in the United States](https://www.tamtam.ai/l/construction-companies-united-states) (3,271)

## The same list elsewhere in United States

- [Telecommunications companies in California](https://www.tamtam.ai/l/telecommunications-companies-california) (105)
- [Telecommunications companies in Texas](https://www.tamtam.ai/l/telecommunications-companies-texas) (81)
- [Telecommunications companies in New York State](https://www.tamtam.ai/l/telecommunications-companies-new-york-state) (56)
- [Telecommunications companies in Florida](https://www.tamtam.ai/l/telecommunications-companies-florida) (55)
- [Telecommunications companies in Virginia](https://www.tamtam.ai/l/telecommunications-companies-virginia) (40)
- [Telecommunications companies in Georgia](https://www.tamtam.ai/l/telecommunications-companies-georgia) (26)
- [Telecommunications companies in Massachusetts](https://www.tamtam.ai/l/telecommunications-companies-massachusetts) (26)
- [Telecommunications companies in New York](https://www.tamtam.ai/l/telecommunications-companies-new-york) (26)

## The same list elsewhere

- [Telecommunications companies in the world](https://www.tamtam.ai/l/telecommunications-companies-in-the-world) (3,307)
- [Telecommunications companies in North America](https://www.tamtam.ai/l/telecommunications-companies-in-north-america) (899)

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Source: https://www.tamtam.ai/l/telecommunications-companies-united-states