| Business | Phone |
| Corporate Office Properties 10840 Guilford Rd, Annapolis Jct 20701 | (301) 490-3251 |
| Corporate Office Properties 135 National Business # 105, Annapolis Jct 20701 | (410) 724-2200 |
| Corporate Realty Management 131 National Business Pkwy, Annapolis Jct 20701 | (301) 725-2577 |
| Corporate Realty Management 141 National Business Pkwy, Annapolis Jct 20701 | (301) 725-2485 |
| Corporate Realty Management 2730 Hercules Rd, Annapolis Jct 20701 | (301) 490-1358 |