| Business | Phone |
| Association Of Telecom Mgmt 101 W Ohio St # 2000, Indianapolis 46204 | (317) 624-2000 |
| Broadcast Services 4801 Industrial Pkwy, Indianapolis 46226 | (317) 895-9050 |
| Business Infrastructure Group 1111 E 54th St # 138, Indianapolis 46220 | (317) 254-0816 |
| Discovery Consulting Inc 120 E Market St, Indianapolis 46204 | (317) 630-4100 |
| Telcorp International 5750 Castle Creek Pky North Dr, Indianapolis 46250 | (317) 849-5239 |
| Telemanage Training Inc 6325 Digital Way # 490, Indianapolis 46278 | (812) 336-6400 |
| Publicall Telecommunications 6330 E 75th St # 164, Indianapolis 46250 | (317) 570-1052 |