| Business | Phone |
| Dbm Communications Inc 305 Washington Ave, Towson 21204 | (410) 825-7400 |
| Domtar Communication 100 West Rd, Towson 21204 | (410) 832-7101 |
| Tango Communications 1 W Pennsylvania Ave, Towson 21204 | (410) 769-8300 |
| West Street Communications 825 Dulaney Valley Rd, Towson 21204 | (410) 296-7112 |