| Business | Phone |
| Benchmark Electronic Inc Baltimore 21225 | (410) 636-0879 |
| Chuday Communications 109 Saint Dunstans Rd, Baltimore 21212 | (410) 464-1100 |
| Citimedia Inc 3419 Bancroft Rd, Baltimore 21215 | (410) 764-0876 |
| Direct Connects Assoc 851 Mchenry St, Baltimore 21230 | (410) 528-9696 |
| E Spire Communications 4100 E Pratt St, Baltimore 21224 | (410) 369-5000 |
| Power Comm 9123 Belair Rd, Baltimore 21236 | (410) 529-6982 |
| Isb Baltimore 1301 S Baylis St, Baltimore 21224 | (410) 327-9767 |
| Kick-Off Sports 3500 Boston St # 329, Baltimore 21224 | (410) 327-9770 |
| Mike Brown Paging Co 2664 Flora St, Baltimore 21217 | (410) 225-0446 |
| Omni Communications Inc 504 Cathedral St # 100, Baltimore 21201 | (410) 962-8010 |
| Atlantic Networks Inc 4300 Ridge Rd, Baltimore 21236 | (410) 661-1560 |
| Rej & Assoc 6 E Hamilton St, Baltimore 21202 | (410) 332-4070 |
| Ccg Facilities Intergration 1500 S Edgewood St, Baltimore 21227 | (410) 525-0010 |
| Global Link 300 Reisterstown Rd # 203, Baltimore 21208 | (410) 415-6844 |
| Televest Communications 920 Providence Rd # 304, Baltimore 21286 | (410) 337-2426 |