Spark, formerly Telecom New Zealand, runs its own 4G and 5G mobile network, with equipment on towers owned by Connexa and the Rural Connectivity Group. For fixed broadband it buys wholesale fibre and copper access. Its 3G network closed on 31 March 2026.

Fixed network
- Technologies
- FibreCopper
- Subscribers
- 424k· June 2026, fibre (408k) and copper
- Coverage
- New Zealand
Only 13,000 lines were left on Spark's copper phone network (PSTN) in June 2026, against over a million in 2017.

Mobile network
- Network used
- Spark
- Technologies
- 5G4GSatellite (Starlink)
- Subscribers
- 2.6M· June 2026, excl. MVNO
- Coverage
- New Zealand
4G and 5G reach 99% of New Zealanders, 5G over 60% (June 2026). Spark equipment sits on 1,600 third-party and 572 RCG towers.