| Business | Phone |
| American Investigations 275 Kings Hwy 108, Brownsville 78521 | (956) 831-4740 |
| Southwestern Security Svc Inc 505 E Washington St, Brownsville 78520 | (956) 546-4141 |
| Dsi Security Svc 3505 Boca Chica Blvd 240, Brownsville 78521 | (956) 544-4849 |
| American Surveillance Co Inc 55 Galonsky St 102, Brownsville 78521 | (956) 504-5656 |
| Valley Wide Security 328 E Jefferson St, Brownsville 78520 | (956) 982-0976 |
| Valley Wide Security 810 E Van Buren St, Brownsville 78520 | (956) 544-4726 |