| Business | Phone |
| Aat Communications Corp 12444 Powerscourt Dr # 140, St Louis 63131 | (314) 821-3100 |
| A K Systems Inc 4440 W Florissant Ave, St Louis 63115 | (314) 385-8770 |
| A T & T Solutions 1901 Chouteau Ave, St Louis 63103 | (314) 621-4850 |
| Aet Medical 10411 Clayton Rd # 300, St Louis 63131 | (314) 994-7200 |
| Allegiance Telecom Inc 12655 Olive Blvd, St Louis 63141 | (314) 317-8500 |
| Axis Telesolutions 2110 S Vandeventer Ave, St Louis 63110 | (314) 333-4250 |
| Band Width Exchange Building 210 N Tucker Blvd # 511, St Louis 63101 | (314) 621-1226 |
| Automated Telecom Inc 745 Craig Rd, St Louis 63141 | (314) 872-1654 |
| Broadwing Communications 900 Walnut St, St Louis 63102 | (314) 436-2413 |
| Tele Services Inc 511 Withers Ave, St Louis 63147 | (314) 231-9820 |
| Swbt 9500 Natural Bridge Rd, St Louis 63134 | (314) 428-2233 |
| Tcg-St Louis 1 Cityplace Dr, St Louis 63141 | (314) 569-1551 |
| Regional Justice Information 4255 W Pine Blvd, St Louis 63108 | (314) 535-1950 |
| Sage Telecom St Louis 63125 | (314) 256-0907 |
| Phone Corp Inc 5033 Aubert Ave, St Louis 63115 | (314) 381-3562 |
| Nisco 710 N 2nd St # 500s, St Louis 63102 | (314) 241-3300 |
| Panasonic Telecommunication 7801 Blackberry Ave, St Louis 63130 | (314) 721-9584 |
| Level 3 Communications Inc 1015 Locust St, St Louis 63101 | (314) 242-5600 |
| Maxs Tel Telecommunications 11710 Administration Dr, St Louis 63146 | (314) 432-0077 |
| Interactive Services Inc St Louis 63101 | (314) 436-8999 |
| Fina Telecommunications 1010 Pine St, St Louis 63101 | (314) 588-1726 |
| Consolidated Telecom Svc 3830 Washington Blvd, St Louis 63108 | (314) 535-2002 |
| Evelution Wireless Llc 11715 Administration Dr, St Louis 63146 | (314) 427-1414 |
| Extel Communications Inc 8301 Crest Industrial Dr # A, St Louis 63123 | (314) 352-2266 |
| Birch Telecom 543 Hanley Industrial Ct, St Louis 63144 | (314) 646-7522 |
| Communications 2000 2641 Telegraph Rd, St Louis 63125 | (314) 771-2000 |
| Convergence Communications 12977 N 40 Dr, St Louis 63141 | (314) 786-1100 |
| Covad Communications 135 N Lindbergh Blvd, St Louis 63141 | (314) 569-3664 |
| Cross Telecom 614 Forest Ct # 1s, St Louis 63105 | (314) 726-3022 |