Amateur Radio Callsigns in ZIP Code: 04104
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| K1JB | BLINICK, JOSEPH S | PORTLAND | ME | United States |
| W1KVI | PORTLAND AMATEUR WIRELESS ASSOC | Portland | ME | United States |
| WX1U | NELSON, GARY C W | PORTLAND | ME | United States |
| K4JAG | Glass, Joel A | PORTLAND | ME | United States |
| KB1VZE | Brooks, Francis C | Portland | ME | United States |
| W1CJC | Carlsson, CJ | Portland | ME | United States |