| Business | Phone |
| Tpg Inc 9400 N Macarthur 124-, Irving 75063 | (214) 353-6953 |
| Pro Phone 2221 E Grauwyler Rd 100, Irving 75061 | (972) 871-1900 |
| Securus Technologies Inc 8201 Tristar Dr, Irving 75063 | (972) 988-3737 |
| Tekelec 8445 Freeport Pkwy, Irving 75063 | (972) 929-0234 |