| Business | Phone |
| T-Mobile 621 Northwest Plz, St Ann 63074 | (314) 291-9700 |
| Prime Wireless Inc 252 Northwest Plz, St Ann 63074 | (314) 770-9009 |
| Kcs Integration 10931 Saint Boniface Ln, St Ann 63074 | (314) 427-2230 |
| Cingular Wireless 500 Northwest Plz, St Ann 63074 | (314) 298-3800 |