JOHN T O'Brien
Active- Service
- Amateur Vanity
- Class
- Amateur Extra
- Location
- POTOMAC, MD
- FRN
- 0004989471
- Granted
- Aug 8, 2026
- Expires
- Nov 4, 2036
FCC Amateur and GMRS license lookup
Search public FCC ULS records by callsign, FRN, name, or location.
K3LO
- 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.