| Business | Phone |
| Donald W Guyton Inc 2304 Quebec School Rd, Middletown 21769 | (301) 371-6899 |
| Industrial Electrical Constr Middletown 21769 | (301) 371-9200 |
| Ken's Electric 203 Church St, Middletown 21769 | (301) 371-7043 |
| Pem Electrical Inc 8596 Valley Dr, Middletown 21769 | (301) 371-9422 |