| Business | Phone |
| Broadwing Communications 2015 Lord Baltimore Dr, Windsor Mill 21244 | (410) 277-0230 |
| Hi-Tech Communication Systems 7417 Hindon Cir, Windsor Mill 21244 | (410) 390-2121 |
| Ixc Communications 2700 Lord Baltimore Dr, Windsor Mill 21244 | (410) 277-0319 |