| Business | Phone |
| Bay Communications Annapolis 21401 | (410) 224-1115 |
| Core Communications 19 Weems Creek Dr, Annapolis 21401 | (410) 216-9865 |
| Core Communications 3034 Aberdeen Rd, Annapolis 21401 | (410) 216-7020 |
| Global Communications Sols Annapolis 21401 | (410) 990-1500 |
| Itt Industries 20 Ridgely Ave, Annapolis 21401 | (410) 990-4401 |
| Jdm Communications Inc 301 4th St # B2, Annapolis 21403 | (410) 295-0110 |
| Nominating Conv Comm Annapolis 21401 | (410) 266-7262 |
| Spectrasite Communications 2002 Annapolis Mall, Annapolis 21401 | (410) 224-0489 |
| Video Communications Corp 222 Severn Ave, Annapolis 21403 | (410) 295-9940 |