| Business | Phone |
| 3gx Telecom 2206 6th Ave, Seattle 98121 | (206) 441-0276 |
| Abovenet Communications 3433 S 120th Pl, Seattle 98168 | (206) 988-8600 |
| Accel Telephone Systems Inc 1122 E Pike St, Seattle 98122 | (206) 323-5500 |
| Accessline Communications 11201 Se 8th 200, Seattle 98104 | (206) 621-3500 |
| Accretive Technology Group 2001 6th Ave, Seattle 98121 | (206) 443-6401 |
| All Phase Communications Inc 317 N 148th St, Seattle 98133 | (206) 363-3100 |
| Aubeta Networks Llc 801 S Fidalgo St, Seattle 98108 | (206) 766-8800 |
| Blue Jack Systems 8927 Roosevelt Way Ne, Seattle 98115 | (206) 219-7300 |
| Cascade Electronics 12345 Lake City Way Ne 193, Seattle 98125 | (206) 361-4800 |
| Communication Management Svc Seattle 98122 | (206) 320-0020 |
| Communications Access 1201 3rd Ave, Seattle 98101 | (206) 628-8060 |
| Ctg North West Nexus 2001 6th Ave, Seattle 98121 | (206) 956-0388 |
| Data Point Systems 3526 Magnolia Blvd W, Seattle 98199 | (206) 286-7581 |
| Electric Lightwave Inc 1218 3rd Ave # 915, Seattle 98101 | (206) 812-2000 |
| Eschelon Property Solutions 3524 Stone Way N, Seattle 98103 | (206) 545-4590 |
| Broadwing Communications 1511 6th Ave 200, Seattle 98101 | (206) 219-7600 |
| Featurefon 417 2nd Ave W, Seattle 98119 | (206) 479-2054 |
| First Federated Communications 600 Stewart St # 1500, Seattle 98101 | (206) 443-8605 |
| Five Nines Networks 601 Union St 4200, Seattle 98101 | (206) 652-5599 |
| Focal Communications 1511 6th Ave # 2, Seattle 98101 | (206) 903-1212 |
| France Telecom 1000 Denny Way, Seattle 98109 | (206) 624-3268 |
| Global Crossing 2001 6th Ave 1604, Seattle 98121 | (206) 577-0700 |
| I Bridge Network Inc 2615 5th Ave, Seattle 98121 | (206) 652-9799 |
| Kallback 417 2nd Ave W, Seattle 98119 | (206) 479-5200 |
| Jade 2206 Queen Anne Ave N, Seattle 98109 | (206) 378-5518 |