Amateur Radio Callsigns in ZIP Code: 95925
| Callsign | Name | City | State | Country |
|---|---|---|---|---|
| KJ6SPO | Bowles, Donald W | Challenge | CA | United States |
| W6YSI | Hays, James S | CHALLENGE | CA | United States |
| KK6GQU | Neilson, Douglas J | Challenge | CA | United States |
| KK6GQV | Aseltine Neilson, Deborah A | Challenge | CA | United States |
| KM6QFX | Hesserbach, Brian D | Wildomar | CA | United States |
| N6CHA | Cha, Henry H | Challenge | CA | United States |