| Business | Phone |
| Fairview Bell & Intercom Corp 502 Gravesend Neck Rd, Brooklyn 11223 | (718) 627-8621 |
| A-1 Intercom Inc 4410 12th Ave, Brooklyn 11219 | (718) 853-3358 |
| All American Electric 1433 E 102nd St, Brooklyn 11236 | (718) 251-1880 |
| Apple Core Electronics 213 Montrose Ave, Brooklyn 11206 | (718) 628-4068 |
| High Rise Fire Protection Corp 144 21st St, Brooklyn 11232 | (631) 249-4100 |
| International Electricians 541 Hancock St, Brooklyn 11233 | (718) 453-1577 |
| Communications Systems Mgmt 1921 E 33rd St, Brooklyn 11234 | (718) 336-5500 |
| Security Intercoms Protection 368 Herkimer St, Brooklyn 11213 | (718) 221-5829 |
| Kol Rom Inc 1214 E 36th St, Brooklyn 11210 | (718) 252-8413 |
| Mandez Communications Ltd 1199 Fulton St, Brooklyn 11216 | (718) 399-3537 |
| Mandez Communications Ltd 1271 Fulton St, Brooklyn 11216 | (718) 399-8060 |
| Mandez Communications Ltd 463 5th Ave, Brooklyn 11215 | (718) 768-8644 |
| Prompt Communications 4121 18th Ave, Brooklyn 11218 | (718) 871-8294 |
| Readymade Garments Trading 593 Coney Island Ave, Brooklyn 11218 | (718) 287-9700 |
| S L Communication Inc 1481 Mcdonald Ave, Brooklyn 11230 | (718) 787-1961 |