| Business | Phone |
| Ami Investigative Svc Inc 2529 Quebec Dr, Corpus Christi 78414 | (361) 985-2063 |
| Bill Causey Investigations 615 N Upper Broadway St, Corpus Christi 78477 | (361) 882-5393 |
| Tecnico Security Corpus Christi 78412 | (361) 993-5422 |
| Tenore Investigations 545 N Upper Broadway St, Corpus Christi 78476 | (361) 882-7400 |
| Tracker One 509 Lawrence St, Corpus Christi 78401 | (361) 882-1171 |
| Brack Warren & Assoc Po Box 297, Corpus Christi 78403 | (361) 884-8000 |
| Shawver & Assoc 6262 Weber Rd 112, Corpus Christi 78413 | (361) 880-8968 |
| Condor Investigations 400 Mann St 902, Corpus Christi 78401 | (361) 881-8977 |
| Quest Investigations Corpus Christi 78404 | (361) 881-1131 |
| Rja Security & Invstgtns 4510 Antioch Cir, Corpus Christi 78413 | (361) 851-0886 |
| P I Unlimited 6224 Weber Rd, Corpus Christi 78413 | (361) 851-8129 |
| Luna Security & Investigations 4418 Squaw Pass Ct, Corpus Christi 78413 | (361) 225-0000 |
| Narcotic Detection Dogs Po Box 10261, Corpus Christi 78460 | (361) 241-1610 |
| Jimenez Investigations 1220 Airline Rd 30, Corpus Christi 78412 | (361) 775-1926 |