| Business | Phone |
| Artemis International Group 7510 Forest View Dr, St Louis 63121 | (314) 381-2010 |
| B T North American 2 Cityplace Dr, St Louis 63141 | (314) 812-2550 |
| Telenomics Group 1515 N Warson Rd # 249, St Louis 63132 | (314) 429-2207 |
| Sentry Telcom 7104 Plateau Ave # A, St Louis 63117 | (314) 647-7970 |
| S & S Telecom 40 Patricia Ave, St Louis 63135 | (314) 521-4530 |
| Phone Craft Inc 6509 Devonshire Ave, St Louis 63109 | (314) 352-3000 |
| Mass Strategic Communications 8360 Cornell Ave, St Louis 63132 | (314) 569-2222 |
| Com Connect Llc 4420 Tennessee Ave, St Louis 63111 | (314) 531-1224 |
| Core Telecom Systems 10854 Midwest Industrial Blvd, St Louis 63132 | (314) 372-0240 |
| Dietrich Lockard Group Inc 1516 S Brentwood Blvd # 110, St Louis 63144 | (314) 961-3211 |