BT Group (British Telecom)
- Openreach (manages BT local network)
- BT Retail (home broadband)
- BT mobile (virtual network operated by Vodafone)
- Subsidiaries including:
- BT Wholesale - operates networks on behalf of other companies
- As of 2016 the EE mobile and broadband network.
BT introduced a network-level filter for adult content, BT Parental Controls, in December 2013. It is reported to be using Nominum as its source for site categorisation. BT spent a "seven figure sum" obtaining the system.
BT uses a combination of Cleanfeed and Nominum for court ordered blocks.
- BT reel in Madasafish and Plusnet: Should customers be worried?
- BT puts block on child porn sites | Technology | The Observer
- BBC News - BT Ordered to block links to Newzbin 2 website
- BT Parental Controls
- No anon pr0n for you: BT's network-level 'smut' filters will catch proxy servers too, Register, 2013-12-17
- Cartier vs Sky, 2013