| Business | Phone |
| Air Transport Assn 9050 Junction Dr, Annapolis Jct 20701 | (301) 490-7951 |
| American Assoc-Collegiate Rgst 9050 Junction Dr, Annapolis Jct 20701 | (301) 490-7651 |
| American Association For 9050 Junction Dr, Annapolis Jct 20701 | (301) 490-0056 |
| National League Of Cities 9050 Junction Dr, Annapolis Jct 20701 | (301) 725-4299 |