List of tier 1 internet service providers

This article is a summary of Tier 1 Internet service providers across the world. This page follows the traditional definition of a tier 1, that is an ISP that is settlement free across the entire internet.

The following are Tier 1 ISPs (in alphabetical order):

AT&T

Global Crossing

Level 3

UUNET (MCI WorldCom)

Nippon Telegraph and Telephone

Qwest

Savvis Communications Corporation (formerly Cable & Wireless)

Sprint_Nextel_Corporation

See Tier 1 carrier for more information.