Xfinity is Comcast's consumer brand. Its fixed network is Comcast's own hybrid fiber-coax (HFC) cable network, passing 65.0M homes and businesses. Xfinity Mobile, launched in 2017, is an MVNO on Verizon's network, with Comcast's own CBRS 5G cells and Wi-Fi hotspots.

Fixed network
- Network used
- Xfinity
- Technologies
- Cable (HFC, DOCSIS 3.1)DOCSIS 4.0Fiber (FTTP)
- Subscribers
- 28.5M· June 2026
- Coverage
- United States
1.25M new homes and businesses passed in 2025, a quarter of them rural. Multi-gig downloads reach about 60% of residential customers.

Mobile network
- Technologies
- 5G
- Subscribers
- 10.2M lines· June 2026
- Coverage
- United States
Runs on Verizon's network, with Comcast CBRS 5G small cells and more than 23 million Xfinity WiFi hotspots.