These Australian telecommunications companies include major national carriers and specialized service providers. Among them, Telstra offers technology and content solutions with Australia's largest mobile network, while Optus provides mobile, internet, and business services to over 10 million customers. nbn® Australia operates the national broadband network, and TPG Telecom delivers mobile, internet, and fixed network solutions. Vocus is known for its extensive fiber network and subsea cables, and Aussie Broadband focuses on high-quality internet services and customer satisfaction.
The data shows a concentration of headquarters in Sydney and its surrounding areas, including Macquarie Park, North Sydney, Barangaroo, and Chatswood. Many of these firms were founded in the 21st century, indicating a period of significant growth and development in the Australian telecommunications sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Telstratelstra.com.au
Providing technology and content solutions for a connected future, with a focus on customer experience and Australia's largest mobile network |
35,493 | |||
| 2 |
Optusoptus.com.au
A leading Australian telecom company offering mobile, internet, entertainment, and business services to over 10 million customers with advanced technology and network coverage |
11,040 | |||
| 3 |
nbn® Australianbn.com.au
Operates national broadband network enabling providers to deliver fast, reliable, secure internet services across Australia with community engagement. |
5,287 | |||
| 4 |
TPG Telecomtpgtelecom.com.au
A leading telecommunications company in Australia offering mobile, internet, business, and fixed network solutions to consumers, businesses, and wholesale customers |
5,275 | |||
| 5 |
Vocusvocus.com.au
Provides extensive fibre network and diverse connectivity solutions including subsea cables, private networks, and satellite services across Australia. |
1,801 | |||
| 6 |
TPGtpg.com.au
Leading provider of fixed broadband and communication services in Australia, offering NBN, ADSL2+, Fibre Optic, mobile plans, and networking solutions with own infrastructure and submarine cable connectivity |
1,747 | |||
| 7 |
Vocus Group Limitedvocusgroup.com.au
Provider of telecommunications infrastructure in Australia and New Zealand with a focus on simplicity, reliability, and automation to meet customer connectivity needs |
1,714 | |||
| 8 |
Dodo Servicesdodo.com
Provider of telecommunications, energy, and insurance services focused on competitive pricing, customer choice, and delivering great value in Australia. |
1,526 | |||
| 9 |
Sitel
Specializing in site visits, designing and drafting telecommunication projects, conducting site inspections, issuing certificates, and preparing feasibility reports for various stages of work |
1,137 | |||
| 10 |
Aussie Broadbandaussiebroadband.com.au
A growing internet service provider in Australia, offering high-quality internet services with a focus on customer satisfaction, local support, and community impact |
1,015 | |||
| 11 |
iiNetiinet.net.au
An Australian ISP offering ADSL2+ and nbn™ services with a focus on customer service and passion for connecting Australians better |
829 | |||
| 12 |
AirTrunkairtrunk.com
Rapidly expanding technology provider delivering hyperscale data centers across APJ to meet the needs of influential tech companies |
776 | |||
| 13 |
Superloopsuperloop.com
Superloop unleashes the possibilities of the internet with carrier-grade networks, providing high-performance connectivity services for residential customers, businesses, and corporations in Australia |
771 | |||
| 14 |
BSA Limited.bsa.com.au
Leading technical services company in Australia, offering flexible and tailored solutions based on extensive industry experience |
503 | |||
| 15 |
BAI Communicationsbaicommunications.com
Extensive broadcast network delivering TV and radio services, enabling 5G coverage, smart precincts, and mission-critical communications for various sectors. |
483 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
VASP Group
Specialists in designing, deploying, and integrating high performance telecommunications networks for various industries in Australasia, PNG, and the South Pacific |
448 | |||
| 17 |
NSW Telco Authoritynsw.gov.au
Operates and manages Public Safety Network for frontline responders, working on key NSW Government projects and coordinating connectivity strategy |
321 | |||
| 18 |
amaysimamaysim.com.au
The company offers affordable big data mobile plans for free spirits, providing great value without hefty telco bills Feel the thrill with amaysim |
288 | |||
| 19 |
Silcarthiess.com.au
Provider of outsourcing maintenance services for various industries including power, manufacturing, mining, and automotive, with a focus on mechanical and electrical maintenance |
263 | |||
| 20 |
Radlink Communicationsradlink.com.au
A leading Australian provider of wireless communication solutions, specializing in digital radio technologies for government, mining, oil & gas, and agriculture industries |
262 | |||
| 21 |
YY Digitalyydigital.com
YY Digital specializes in building enterprise mobile, tablet, and web applications with a focus on UI design and quality technical solutions |
198 | |||
| 22 |
Moremore.com.au
Premium provider of nbn®, phone, and mobile services in Australia, offering unlimited data plans, business-grade solutions, exclusive offers, and Telstra Wholesale Mobile Network coverage |
195 | |||
| 23 |
5G Networks Ltd5gnetworks.au
A licensed telecommunications carrier in Australia, offering data networks, cloud hosting, and managed services to mid market, enterprise, and government sectors |
186 | |||
| 24 |
Freshtelfreshtelholdings.com
An Australian company specializing in developing and marketing VoIP products and services, allowing voice calls to be made over the Internet |
184 | |||
| 25 |
CPS Technology & Infrastructure Pty Ltdcpstech.com.au
A leading Australian telecommunications infrastructure deployment organization, providing reliable and cost-effective services to major carriers nationally and internationally since 1992 |
172 | |||
| 26 |
Sinch MessageMediamessagemedia.com
Sinch MessageMedia provides mobile messaging solutions for businesses to connect with customers, offering integrations, bulk SMS, automated campaigns, alerts, and more |
169 | |||
| 27 |
Vodafone Business Australiavodafone.com.au
Providing reliable connectivity solutions and support to businesses across industries for effective team communication and customer engagement. |
151 | |||
| 28 |
BAI Communications Australia (formerly Broadcast Australia)broadcastaustralia.com.au
Operates and develops a vital infrastructure network for broadcasting, telecommunications and government customers in Australia, providing transmission services for TV and radio |
149 | |||
| 29 |
CITCC NIGERIA LIMITEDcitcc.ng
We provide telecommunications infrastructure services, business process outsourcing, and application content in Africa, with a focus on developing communication networks globally |
146 | |||
| 30 |
Symbiossymbios.com.au
An Australian outsourcing business specializing in Lead Generation and Outbound Sales, with offshore centers in the Middle East providing skilled agents |
65 | |||
| 31 |
SiteSeesitesee.io
SiteSee provides the Telco industry with a Next Generation Digital Twin system for enhanced design and customer interaction |
17 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Australia
- The largest companies in Australia 5,556
- Multinational companies in Australia 1,184
- Retail chains in Australia 577
- Financial services firms in Australia 483
- Critical infrastructure operators in Australia 450
- Education providers in Australia 402
- Healthcare providers in Australia 397
- Professional services firms in Australia 377
- Financial Services companies in Australia 373
- Government Administration companies in Australia 351
- Public sector organisations in Australia 326
- Manufacturers in Australia 320
- Companies with a mobile app in Australia 305
- Publicly traded companies in Australia 299
- Hospitals and Health Care companies in Australia 297
- Corporate groups and holding companies in Australia 280
- E-commerce companies in Australia 247
- Retail companies in Australia 243
- Companies with in-house R&D in Australia 235
- IT Services and IT Consulting companies in Australia 215
- Consulting firms in Australia 210
- Non-profit Organizations companies in Australia 190
- Hotel and hospitality groups in Australia 188
- Construction companies in Australia 186