| Business | Phone |
| Constellation Generation Group 1997 Annapolis Exchange Pkwy, Annapolis 21401 | (410) 897-5000 |
| J M Mullen Electric Svc 1825 Generals Hwy, Annapolis 21401 | (410) 266-6316 |
| Oliver Electric 829 Janice Dr, Annapolis 21403 | (410) 280-2022 |
| Southern Maryland Elec Co-Op State Cir, Annapolis 21401 | (410) 263-1893 |