| Business | Phone |
| Cap Rock Communications 13455 Noel Rd, Dallas 75240 | (972) 982-9500 |
| Cap Rock Communications 2323 Bryan St, Dallas 75201 | (214) 210-0885 |
| Cap Rock Communications 600 N Pearl St, Dallas 75201 | (214) 720-0385 |
| Latinos Communications 11250 Harry Hines Blvd 214, Dallas 75229 | (972) 241-8531 |
| Netvoice Technologies 13747 Montfort Dr, Dallas 75240 | (972) 788-2988 |
| Operator Service Co 2323 Bryan St 400, Dallas 75201 | (214) 922-7066 |
| Teleglobe 2323 Bryan St, Dallas 75201 | (214) 754-0625 |
| Tex-Link Communications 13601 Preston Rd 802, Dallas 75240 | (214) 446-0500 |
| Touch Tone Telecom 2323 Bryan St, Dallas 75201 | (214) 438-0899 |
| Waller Creek Communications 2323 Bryan St # 850, Dallas 75201 | (214) 220-3878 |
| Zirca.Com 13800 Senlac Dr, Dallas 75234 | (214) 654-5000 |
| Mci 1950 N Stemmons Fwy, Dallas 75207 | (214) 571-3200 |
| Mfs Intelenet Inc 1950 N Stemmons Fwy, Dallas 75207 | (214) 746-5324 |
| Pronto Card 17311 Dallas Pkwy, Dallas 75248 | (972) 380-4240 |
| Teleglobe 1950 N Stemmons Fwy, Dallas 75207 | (214) 744-0887 |
| Touch Tone Telecom Inc 17000 Dallas Pkwy, Dallas 75248 | (972) 380-1900 |
| Worldquest Network Inc 16990 Dallas Pkwy, Dallas 75248 | (972) 818-0460 |
| Nts Communications Inc 4316 Bryan St, Dallas 75204 | (214) 824-6659 |
| Westel Inc 12201 Merit Dr 225, Dallas 75251 | (972) 991-4795 |