| Business | Phone |
| Universal Wireless 6857 W Main St, Kalamazoo 49009 | (269) 488-7633 |
| Superior Telephone Svc Inc 1341 E Crooked Lake Dr, Kalamazoo 49009 | (269) 372-1367 |
| Norlight Telecommunications Kalamazoo 49009 | (269) 375-0491 |
| Heystek Technologies 259 E Michigan Ave # 107, Kalamazoo 49007 | (269) 344-7400 |
| Interconnect Services 517 N 8th St, Kalamazoo 49009 | (269) 372-4494 |