| Business | Phone |
| Adi 7425 Pinemont Dr 100, Houston 77040 | (713) 690-1400 |
| Comman Services Inc 7138 Sawmill Trl, Houston 77040 | (713) 896-6916 |
| World Datacom 8418 Bondale St, Houston 77040 | (713) 680-0081 |
| Zultys Technologies Houston 77040 | (713) 580-0802 |
| Basicomm Inc 8313 Southwest Fwy 113, Houston 77074 | (713) 778-0019 |
| Centech Communications Corp 8323 Southwest Fwy 370, Houston 77074 | (713) 988-9900 |
| A-1 Voice & Data 10400 Westoffice Dr 118, Houston 77042 | (713) 334-2044 |
| Comedia Communication 800 Wilcrest Dr 110, Houston 77042 | (713) 783-2209 |
| Telavergence 2825 Wilcrest Dr 261, Houston 77042 | (281) 919-0250 |
| A I Technologies Inc 1121 Capitol St, Houston 77002 | (713) 222-2228 |
| Aabc Communications 4631 Wild Indigo St, Houston 77027 | (713) 877-8118 |
| Absolute Voice & Data Systems 4901 Milwee St 110, Houston 77092 | (713) 957-2205 |
| Acs-Alpha Communications 6420 Richmond Ave, Houston 77057 | (713) 783-5272 |
| Affiliated Telephone 7115 Belgold St F, Houston 77066 | (281) 580-9055 |
| Aggreko Customer Support Center 15600 John F Kennedy Blvd, Houston 77032 | (281) 925-2500 |
| American Communication Svc Inc 6001 Gulf Fwy # B117, Houston 77023 | (713) 923-9393 |
| Amtel Communications Co 1830 S Kirkwood Rd 201, Houston 77077 | (713) 977-1000 |
| Apex Telecommunications Svc 505 N Sam Houston Pkwy E 340, Houston 77060 | (281) 847-1921 |
| Apollo Communications Houston 77058 | (281) 488-3533 |
| Arceneaux Telephone Repair 11717 Beamer Rd 284, Houston 77089 | (713) 298-1581 |
| Atc Communications Houston 77029 | (713) 673-9990 |
| Atsi 8100 Westglen Dr, Houston 77063 | (713) 777-5977 |
| Ayer Tech Telecom 2626 South Loop W, Houston 77054 | (713) 661-6960 |
| Budget Telephone Systems 1717 Oak Tree Dr, Houston 77080 | (713) 722-8666 |
| C & R Telecommunications Inc 8818 Talcott Ln, Houston 77049 | (281) 456-8188 |
| Cajun Communications 19631 Coppervine Ln, Houston 77084 | (281) 579-3200 |
| Classic Tele-Svc 3811 Heatherbrook Dr, Houston 77045 | (713) 661-1313 |
| Cms Communications Inc 1900 North Loop W, Houston 77018 | (713) 957-0052 |
| Control Voice & Data Systems 6910 Fannin St 265, Houston 77030 | (713) 791-1191 |
| Copper Communications Inc 11211 Katy Fwy, Houston 77079 | (832) 358-8000 |
| Crosstalk Communications 9225 Katy Fwy, Houston 77024 | (713) 461-7967 |
| Cst Corp 2500 Central Pkwy D, Houston 77092 | (713) 263-1300 |
| Digicom Technologies 10690 Shadow Wood Dr 113, Houston 77043 | (713) 722-7229 |
| Digiline Business Comm Systems Houston 77092 | (713) 680-1223 |
| Discount Communications Co 1300 Redford St, Houston 77034 | (713) 943-2861 |
| Executive Communications Corp 3300 Chimney Rock Rd 100a, Houston 77056 | (713) 789-9790 |
| Executive Of Houston 3900 North Fwy, Houston 77022 | (713) 696-3152 |
| Executive Telephone Co 2309 Naomi St, Houston 77054 | (713) 799-1600 |
| First Choice Telecom 10340 E Hardy Rd, Houston 77093 | (832) 200-1555 |
| Fitt Telecommunication 5829 W Sam Houston Pkwy N, Houston 77041 | (713) 849-2473 |
| Panasonic Business Telephone Po Box 270591, Houston 77277 | (713) 688-0044 |
| Genesis Telcom Inc 1225 North Loop 100, Houston 77022 | (713) 868-5415 |
| Genesis Telecom 1225 North Loop W 100, Houston 77008 | (713) 868-1345 |
| Mercury Communications 11205 Bellaire Blvd, Houston 77072 | (281) 933-2373 |
| Global Resource 2123 Fm 1960 Rd W 232, Houston 77090 | (281) 444-7444 |
| Gordon Communications Inc Houston 77044 | (713) 988-9112 |
| Masters Communications 9135 Katy Fwy, Houston 77024 | (713) 467-7803 |
| Magellan Trading Co Inc 701 Bering Dr, Houston 77057 | (713) 532-8686 |
| Hillman Enterprises 7015 Bent Branch Dr, Houston 77088 | (713) 466-1084 |
| Home & Business Telecomms Svc Houston 77099 | (281) 530-6187 |
| Hooper Communications Co 5335 Brystone Dr, Houston 77041 | (713) 466-7000 |
| Houston Voice & Data 21123 W Hardy Rd, Houston 77073 | (281) 443-4858 |
| Houston Voice Solutions 2656 South Loop W 103a, Houston 77054 | (713) 667-3777 |
| Ics Telephones 8833 N Sam Houston Pkwy W, Houston 77064 | (713) 225-5427 |
| Inter-Tel Inc 1140 West Loop N, Houston 77055 | (713) 844-0850 |
| Lantana Communications 440 Benmar Dr, Houston 77060 | (281) 447-6885 |
| National Telco Inc 9811 North Fwy # B211, Houston 77037 | (281) 999-0402 |
| Nelms/Goodman Properties 608 Jackson Hill St, Houston 77007 | (713) 868-3288 |
| DataVox 2000 West Sam Houston Parkway South, 9th Floor, Houston 77042 | (713) 881-5300 |