Spectrum is Charter's brand. Its fixed network is Charter's own hybrid fiber-coax plant, and Spectrum Mobile is an MVNO on Verizon's network. Charter bought Cox Communications on August 19, 2026, taking Spectrum to more than 70M homes and businesses in 45 states.

Fixed network
- Network used
- Spectrum
- Technologies
- Cable (HFC, DOCSIS 3.1)
- Subscribers
- 29.4M· June 2026, before the Cox deal
- Coverage
- 45 states
Upgrade to 1.2 then 1.8 GHz and DOCSIS 4.0, largely done by the end of 2027. 127,000 subsidized rural passings activated in Q2 2026.

Mobile network
- Technologies
- 5G4G LTE
- Subscribers
- 12.5M lines· June 2026, before the Cox deal
- Coverage
- United States
About 45M WiFi access points carry nearly 90% of phone traffic. Charter also holds 210 CBRS licenses for its own 5G small cells.