Telkom's fixed services run on Openserve, the group's open-access fibre network, also used by other ISPs. Telkom Mobile builds its own network, 8,504 base stations in June 2026, and roams on MTN. Swiftnet, its 4,000 masts and towers, was sold in January 2025.

Fixed network
- Technologies
- Fibre (FTTH)Copper (xDSL)
- Coverage
- South Africa
Openserve fibre passed 1,565,750 homes in June 2026. 843,563 were connected, a 53.9% take-up.

Mobile network
- Network used
- Telkom
- Technologies
- 4G LTEVoLTE
- Subscribers
- 25.3M· June 2026
- Coverage
- South Africa
Telkom Mobile added 511 sites in the year to March 2026 and reached 85% population coverage.