| Business | Phone |
| B A Hartman Electric Inc 507 Hawk View Rd, Hummelstown 17036 | (717) 566-7655 |
| Colonial Electric Svc Co 118 Orchard Rd # A, Hummelstown 17036 | (717) 533-4719 |
| J W Lex Electric 260 W High St, Hummelstown 17036 | (717) 566-9503 |
| Pomanti Electric 1 Harrogate Dr, Hummelstown 17036 | (717) 566-1456 |