Sky, owned by Comcast, has no fixed or mobile network of its own in the UK. Sky Broadband runs over Openreach and, under a 2024 deal, CityFibre's full fibre. Sky Mobile is an MVNO on O2, the Virgin Media O2 network, and uses its 4G and 5G.

Fixed network
- Technologies
- Full fibre (FTTP)Fibre (FTTC)
- Coverage
- United Kingdom
Sky full fibre plans reach 79% of UK homes and superfast (FTTC) 95%. Sky aims to move over 80% of its base to full fibre by 2028.

Mobile network
- Technologies
- 5G4G
- Coverage
- United Kingdom
On O2's network: 4G outdoor coverage reaches 99% of the UK population, O2 5G 87% of the outdoor population (end of 2025).