1. USA Mobility Inc 15303 Dallas Pkwy, Addison, TX 75001 Coordinate: 32.95873,-96.82235 Phone: (972) 851-7080
2. NCC Phone Systems Dallas 16775 Addison Rd Ste 420, Addison, TX 75001 Coordinate: 32.98013,-96.83136 Phone: (972) 371-0309