Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K4JFR
ActiveRobertson IV, James F
- Location
- Angwin, CA
- Class
- Amateur Extra
- Granted
- 2020-03-17
- Expires
- 2030-04-23
- Previous call
- KJ6DDK
- FRN
- 0019238807
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Vanity availability
HeldCurrently held
K4JFR is held by an active license; it isn't a vanity slot right now.
Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).
Callsign genealogy
Full chain →Previously held by current licensee
- Robertson IV, James FCAgranted 2009-10-30cancelled 2010-04-23
License history
0 eventsNo recorded events.