Pipex (/ˈpaɪpɛks/ PY-peks) was the United Kingdom's first commercial Internet service provider (ISP).

In 1992 it began operating a 64k transatlantic leased line and built a connection to the UK government's JANET network.

[1] The Pipex name was used by a number of companies within the group, which were gradually renamed following the sale of its home broadband business to Tiscali UK in 2007.

[3] In November 1994, Keith Mitchell, then chief technical officer of PIPEX, initiated a meeting with BT to discuss the creation of a London-based Internet exchange.

Pipex donated a Cisco Catalyst 1200 Network switch which formed the basis of the London Internet Exchange (LINX).