Confidence: Medium · Source: FCC ULS · As of 2026-09-09
KB9YOF
ActiveCaldwell Jr, Herbert W
- Location
- Denver, CO
- Class
- Amateur Extra
- Granted
- 2025-06-06
- Expires
- 2035-06-20
- Previous call
- KF4BCG
- FRN
- 0002264422
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Vanity availability
HeldCurrently held
KB9YOF 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
- CALDWELL JR, HERBERT WINgranted 1995-06-20cancelled 2000-12-16
License history
0 eventsNo recorded events.