| Business | Phone |
| Texas Carbide Mfg Co 15115 Monrad Dr, Houston 77053 | (713) 433-3654 |
| Front Office Business Ctr 3200 Southwest Fwy 3300, Houston 77027 | (713) 840-6050 |
| Houston Telemessaging Group 12929 Gulf Fwy, Houston 77034 | (281) 485-8763 |
| Interoffice 1 West Loop S, Houston 77027 | (713) 621-5266 |
| Echonet 12703 Veterans Mem Dr 200, Houston 77014 | (281) 444-8264 |
| Procall Of Houston 806 Main St, Houston 77002 | (713) 238-5609 |
| Premiere Conferencing 2402 Wichita St, Houston 77004 | (713) 524-1193 |
| Protocol Communications 3400 Montrose Blvd 910, Houston 77006 | (713) 524-4445 |
| Voicelink Communications 3400 Montrose Blvd 805, Houston 77006 | (713) 785-2299 |
| Answering Service 12929 Gulf Fwy, Houston 77034 | (281) 997-4299 |
| Rams Security 12817 Gulf Fwy, Houston 77034 | (281) 481-1710 |
| Texas Messaging 10333 Harwin Dr, Houston 77036 | (713) 331-0235 |
| Premiere Conferencing Houston 77056 | (713) 960-1053 |
| Twenty Two Hundred Callcenter 1800 Augusta Dr, Houston 77057 | (713) 266-2200 |
| A + Conferencing Inc Ltd 8401 Westheimer Rd 100, Houston 77063 | (713) 954-6601 |
| Answer Systems 2001 Laverne St, Houston 77080 | (713) 465-6754 |
| 1960 Professional Answering 17070 Red Oak Dr, Houston 77090 | (281) 893-3038 |
| 1960 Professional Doctors Svc 17070 Red Oak Dr 211, Houston 77090 | (281) 444-8331 |
| Message Technologies Inc Houston 77090 | (281) 893-7675 |
| Pick A Phone 6010 W Tidwell Rd, Houston 77092 | (713) 686-5560 |
| Premiere Technologies 3120 Southwest Fwy, Houston 77098 | (713) 520-1062 |
| Answering Service Inc Apollo 702 Jackson Hill St, Houston 77007 | (713) 880-1888 |
| Paa's Palate Pleasers Po Box 7851, Houston 77270 | (713) 861-8332 |
| Coastal Bay Co 908 Town And Country Blvd 6, Houston 77024 | (713) 526-9150 |
| Telecall Answering Svc 7100 Regency Square Blvd 111, Houston 77036 | (713) 266-8900 |
| Tele-Message 1101 Post Oak Blvd, Houston 77056 | (713) 626-7000 |
| A Better Answer In Bound 450 N Sam Houston Pkwy E 168, Houston 77060 | (281) 445-3434 |