| Business | Phone |
| Advanced Electronics Inc 800 E 160th St, Bronx 10456 | (718) 401-3000 |
| Alba Communications Inc 2086 Bronx Park E, Bronx 10462 | (718) 829-1975 |
| Citiwide Communications Inc 4215 Peters Pl, Bronx 10470 | (718) 881-0800 |
| Jordan Intercom Systems Inc 295 W 231st St # B, Bronx 10463 | (718) 543-5929 |
| Omal Door & Intercom 2445 Beaumont Ave, Bronx 10458 | (718) 584-7325 |
| Prime Intercom Svc 100 Erskine Pl, Bronx 10475 | (718) 320-8005 |