RALPH E UNDERWOOD
Active- Service
- Amateur
- Class
- Technician
- Location
- CASTLE ROCK, CO
- FRN
- 0011417805
- Granted
- Jun 18, 2025
- Expires
- Jul 2, 2035
FCC Amateur and GMRS license lookup
Search public FCC ULS records by callsign, FRN, name, or location.
KB0SXF
- Callsign
- Try W1AW, or enter several callsigns separated by commas.
- FRN
- Find licenses linked to a 10-digit FCC Registration Number.
- Advanced
- Combine a name, location, service, or license dates.