| A | Type | Location |
| Abovenet Communications, Inc. | Carrier | 25B, THC, LA, Chelsea |
| Akamai Technologies | ISP | 25B |
| Arbinet | ISP | 25B |
| AT&T | Carrier | 25B, THC, LA |
| Atlantic Metro Communications LLC | ISP | 25B, THC, 60H |
B
| Bandwidth Solutions | Carrier | THC |
C
| Cable & Wireless Americas Operations | Carrier | LA |
| CAT Telecom Public Company Ltd | ISP | LA |
| China Networks Communications | Carrier | LA |
| China Telecom (USA) Corporation | Carrier | LA |
| Chunghwa Telecom Co.LTD | Carrier | 25B |
| Clear Wireless LLC | ISP | THC |
| Citrix Online | ISP | 25B |
| Cogent | Carrier | 25B, LA, Chelsea |
| Colt Telecommunications | Carrier | 25B |
| Completely Reliable Network Concepts, LLC | ISP | 25B |
D
| Dacom America Inc | Carrier | 25B | DALnet | ISP | 25B, LA |
| DATAGRAM | ISP | 25B |
| DataRoom, Inc. | ISP | 25B, LA |
| Demon Internet | ISP | 25B |
| Datavo | ISP/Carrier | LA |
| Digital Telecommunications Phils.Inc. | Carrier | LA |
| DVS Networks,Inc. | Carrier | 25B |
E
| Easynet Group PLC | ISP | 25B |
| EKU Solutions | ISP/Carriers | 25B |
| Elisa Corporation | ISP | 25B |
| Enkido | CLEC | 25B |
| Energy Group Networks LLC | Carrier | 25B |
| EU Telecom | Carrier | 25B |
| Equant, Inc. | ISP | LA |
| Euroaccess | ISP | 25B |
| Everest Broadband Networks | Carrier | 25B |
F
| Fibernet Equant Access LLC | CLEC | 25B |
| First Telecom | Carrier | Chelsea, LA |
| Flag Telecom | Carrier | 25B |
| Freenet Cityline GmbH | ISP | 25B |
G
| Golden Holdings | Carrier | 25B |
H
| Hibernia Metro | Carrier | 25B |
| HopOne Internet Corporation | ISP | 25B |
| Hurricane Electric LLC | ISP | 25B |
I
| IIJ America | Carrier/ISP | 25B |
| IMC Telecom Inc | Carrier | 25B |
| Init Seven AG | ISP | 25B |
| Integra Telecom Holings Inc | ISP | LA |
| Internet Exchange MSK-IX,JSC | 25B | |
| (The) Internet Solution | Carrier | 25B |
| ISPnet, Inc. | ISP | 25B, THC |
| ISPrime, Inc. | ISP | 25B |
J
K
| KDDI America/KDDI Tokyo | Carrier | 25B, Chelsea, THC, LA |
| Keio University | Carrier/ISP | LA |
| Keyspan Communications | Carrier | 25B |
L
| Level 3 Communications, Inc. | Carrier | 25B, LA, Chelsea, THC |
| LightTower | Carrier | 25B |
| Logic Communcations | Carrier | 25B |
M
N
| Neon Optica | Carrier | 25B |
| Net Access Corporation | ISP | 25B |
| New York Connect.Net Ltd | ISP | LA |
| New York Internet | ISP | 25B |
| nLayer Corporation | ISP | 25B |
| NTT America | Carrier | 25B |
P
| Pangaea Networks | Carrier/ISP | 25B |
| Packet Exchange | Carrier/ISP | 25B |
| Peer1 Network | ISP | 25B |
| Perot Network | ISP | 25B |
| Pilosoft, Inc. | ISP | 25B |
| POWEREDCOM America, Inc. | Carrier/ISP | LA |
| PPL Telecom | Carrier | 25B |
| Primus Telecommunications Canada | ISP | 25B |
| Public Interest Network Services | ISP | 25B |
Q
| Qwest Communcations Corporation | Carrier | 25B |
R
| Reliance | Carrier | 25B |
S
| Sidera Networks | Carrier | 25B, THC, Chelsea | Speakeasy, Inc. | ISP | 25B, LA |
| Sprint Communications Company | Carrier | LA |
| Starlan Comunications | Carrier | 25B |
| Stealth Communications, Inc. | ISP | 25B |
| Sunrise Communications AG | ISP | 25B |
T
| Telcan | ISP | 25B |
| Teleglobe America | Carrier | 25B |
| Telia International Carrier, Inc. | Carrier | 25B |
| Tellurian Networks, Inc. | ISP | 25B, LA |
| Thorn Communications LLC | CLEC | 25B |
| Time Warner Cable | CLEC | 25B, THC |
| Time Warner Telecom Holdings Inc. | CLEC | 25B |
| TINET | Carrier | 25B, Chelsea |
| Tiscali | ISP | 25B |
| T-Systems North America, Inc. | Carrier | 25B |
| TW Telecom | Carrier | 25B |
U
V
| Verizon Business | Carrier | 25B, THC, Chelsea, LA |
| Virgin Media LTD NTL: Telewest | ISP | 25B |
| Voxel dot Net Inc. | Carrier | 25B, THC, Chelsea |
W
| WBSconnect | Carrier | LA |
| Wilshire Connection | Carrier | LA |
| Wiltel | Carrier | 25B, LA |
X
| XO Communications | Carrier | 25B, LA, Chelsea |
Y
| Yahoo! Inc. | ISP | LA |
| Yipes Enterprise Services, Inc. | CLEC | 25B |
Z
| Zaah Tecnologies, Inc. | ISP | THC |
| Zayo Telecom | Carrier | 25B |