| Business | Phone |
| Jcs Communications 188 Old Enterprise Rd, Upper Marlboro 20774 | (301) 249-0005 |
| Mid-Atlantic Communications 1200 Mercantile Ln, Upper Marlboro 20774 | (301) 618-4800 |
| Claro Communications Group Inc 9440 Old Marlboro Pike, Upper Marlboro 20772 | (301) 599-8880 |