| Business | Phone |
| En-Touch Systems Inc 13105 Northwest Fwy, Houston 77040 | (832) 590-5500 |
| Houston Telephone Instltn 6001 Stonington St, Houston 77040 | (713) 462-0976 |
| Time Warner Telecom Inc 7060 Empire Central Dr, Houston 77040 | (713) 341-4000 |
| Telephone Co Of Houston 5610 Almeda Genoa Rd, Houston 77048 | (281) 993-2999 |
| Smoke Signal 8700 S Gessner Dr, Houston 77074 | (713) 981-4517 |
| Cell Club 9131 S Gessner Dr, Houston 77074 | (713) 772-7243 |
| Communications Smoke Signal 8700 S Gessner Dr, Houston 77074 | (713) 484-5119 |
| A T & T 1407 Jefferson St, Houston 77002 | (713) 752-0139 |
| A T & T Capital Corp 2501 Central Pkwy, Houston 77092 | (281) 344-0954 |
| A T & T Local Svc 4112 Mangum Rd, Houston 77092 | (713) 263-8624 |
| Advanced Communicating Techniq 6794 Piccadilly Dr, Houston 77061 | (713) 649-3285 |
| Affordable Services 2626 South Loop W, Houston 77054 | (713) 592-0186 |
| American Telephone Network 1400 Post Oak Blvd, Houston 77056 | (713) 418-2170 |
| Apache Telecom 2400 Augusta Dr, Houston 77057 | (713) 532-8271 |
| Avaya Inc 654 N Sam Houston Pkwy E, Houston 77060 | (281) 260-1300 |
| Basic Phone 5705 Fondren Rd, Houston 77036 | (713) 953-9596 |
| Birch Telecom 16055 Space Center Blvd # 700, Houston 77062 | (281) 283-8010 |
| Birch Telecom 2401 Fountain View Dr 550, Houston 77057 | (713) 781-9477 |
| Ccc Global Com Corp 1250 Wood Branch Park Dr 37, Houston 77079 | (713) 510-4600 |
| Children's Telephone 10831 Paulwood Dr, Houston 77071 | (713) 772-2866 |
| Children's Telephone 1807 Peer Dr, Houston 77043 | (713) 467-6008 |
| Children's Telephone 3214 Reba Dr, Houston 77019 | (713) 523-2247 |
| Children's Telephone 3309 Prospect St, Houston 77004 | (713) 528-1303 |
| Choice.Com 2100 West Loop S 400, Houston 77027 | (713) 355-8170 |
| Choicecom 4801 Woodway Dr, Houston 77056 | (713) 964-2777 |
| Cube 1400 W Sam Houston Pkwy N, Houston 77043 | (713) 465-2823 |
| Cytel 3838 N Sam Houston Pkwy E 400, Houston 77032 | (281) 449-4000 |
| D & B Telephones Inc 6955 Griggs Rd, Houston 77023 | (713) 921-9719 |
| Data Voice Telecom Inc 4606 Fm 1960 Rd W, Houston 77069 | (281) 315-8878 |
| Digi Satellite Telephone Co 2828 Hayes Rd, Houston 77082 | (281) 870-1225 |
| Direct Telephone Co 6300 Richmond Ave, Houston 77057 | (713) 243-2084 |
| Ets Payphone Inc 927 Crosstimbers St, Houston 77022 | (713) 699-3509 |
| Everbody's Phone Co 6666 Harwin Dr 605, Houston 77036 | (713) 268-1610 |
| Payphone.Com 16840 Clay Rd 118, Houston 77084 | (281) 550-5592 |
| Grande Communications Houston 77069 | (281) 220-4890 |
| Green Thumb Networks 10602 Valencia Dr, Houston 77013 | (713) 678-8488 |
| Network Of Assoc Dental Po Box 16182, Houston 77222 | (713) 267-1467 |
| Local Telephone Svc Co Inc 5959 Westheimer Rd 111, Houston 77057 | (713) 688-7612 |
| Logix Communications 1415 Louisiana St # 1450, Houston 77002 | (713) 400-3103 |
| Lawndale Telephone & Car 5115 Lawndale St, Houston 77023 | (713) 926-9244 |
| Yellow Book Usa 12727 Featherwood Dr 200, Houston 77034 | (281) 481-5100 |
| Idt Solutions 333 Clay St # 5000, Houston 77002 | (713) 586-9800 |
| K P Voice & Data 14781 Memorial Dr, Houston 77079 | (281) 531-5209 |
| K P Voice & Data 15002 Yorktown Colony Dr, Houston 77084 | (281) 550-1595 |
| Nii Communications-Houston 1235 North Loop W # 1216, Houston 77008 | (713) 861-8013 |