List of tier 1 internet service providers
The following are Tier 1 ISPs:
- UUNET (owned by Worldcom, doing business as MCI)
- Sprint
- AT&T
- BBN/Genuity
- Level 3
- Cable & Wireless
- Qwest
- NTT/Verio
- Telstra
- Optus
- Connect Internet Solutions
- British Telecom (BT)
- Global Crossing
- Williams Communications