| Bay Telephone Systems (301) 595-7555 | Rockville, MD 20850 4.2 mi 2275 Research Blvd | Call NowDetails |
| C & P Telephone (703) 759-0764 | Great Falls, VA 22066 18.0 mi | Call NowDetails |
| Telephone (301) 210-1148 | Beltsville, MD 20705 26.9 mi 6600 Virginia Manor Rd | Call NowDetails |
