| Business | Phone |
| A T & T 211 N Cassingham Rd, Columbus 43209 | (614) 252-8704 |
| A T & T Cits 7438 Silverleaf Ct, Columbus 43235 | (614) 718-9816 |
| Wil Tel Communications 226 N 5th St, Columbus 43215 | (614) 469-3521 |
| United Medical Corp 1570 Cleveland Ave, Columbus 43211 | (614) 297-6497 |
| United Medical Corp 2575 W Broad St, Columbus 43204 | (614) 272-6780 |
| Bfi Communication 61 E Henderson Rd, Columbus 43214 | (614) 358-9234 |
| Telephone Pioneers Of America 150 E Gay St, Columbus 43215 | (614) 223-5123 |
| Time Warner Telecom 1265 Indianola Ave, Columbus 43201 | (614) 299-8972 |
| Choice One Communications 10 W Broad St # 5, Columbus 43215 | (614) 228-3010 |
| Cincinnati Bell Telephone Co 10 W Broad St # 1000, Columbus 43215 | (614) 280-9117 |
| Connection N High St, Columbus 43201 | (614) 421-3180 |
| Oncomm Communications 251 S 3rd St, Columbus 43215 | (614) 221-4007 |
| Excel Telecommunication Inc 1275 Kriswood Ln, Columbus 43228 | (614) 275-4551 |
| Gabriel Telecommunications 1265 Indianola Ave, Columbus 43201 | (614) 297-7671 |
| Gabriel Telecommunications 2025 Northwest Blvd, Columbus 43212 | (614) 486-3015 |
| Global Crossing Telecomm 355 E Campus View Blvd # 195, Columbus 43235 | (614) 431-2180 |
| Mci 10 W Broad St, Columbus 43215 | (614) 233-4062 |
| Megsinet 266 N 5th St, Columbus 43215 | (614) 324-0196 |
| Midwest Communications 6555 Busch Blvd # 100, Columbus 43229 | (614) 430-8085 |
| Icg Communications Inc 266 N 5th St, Columbus 43215 | (614) 324-1234 |
| Intelcom Inc 1335 Dublin Rd, Columbus 43215 | (614) 486-7740 |