Telstra's mobile network covers 900,000 km² more than any rival and has run on 4G and 5G only since 3G closed in October 2024. Home broadband is sold over nbn, the national wholesale network. In June 2026, Telstra counted 26.0M retail mobile services, IoT included.

Fixed network
- Technologies
- nbn fibre (FTTP)nbn HFCnbn FTTC and FTTNnbn Fixed Wireless
- Subscribers
- 2.82M· June 2026, nbn, consumer and small business
- Coverage
- Australia
Telstra sells nbn access, which 12.68M Australian homes and businesses were able to connect to in July 2026.

Mobile network
- Network used
- Telstra
- Technologies
- 5G Advanced5G4G
- Subscribers
- 8.88M· June 2026, postpaid handheld
- Coverage
- Australia
4G reaches 99.7% of Australians. Nearly 1,200 sites were upgraded to 5G Advanced and over 150 new sites built in FY26.