| Business | Phone |
| D'Antoni Partners Inc 122 W John Carpenter Fwy, Irving 75039 | (972) 719-4400 |
| Direct Packet Research Inc 1431 Greenway Dr, Irving 75038 | (972) 580-8450 |
| Catholic Tutoring Svc Irving 75061 | (972) 253-1401 |
| Thomas Research 222 Las Colinas Blvd W 1750, Irving 75039 | (972) 501-1405 |