Confidence: Medium · Source: FCC ULS · As of 2026-09-10
K4COB
ActiveWalker, John
- Location
- Hilham, TN
- Class
- Amateur Extra
- Granted
- 2020-01-28
- Expires
- 2030-01-28
- Previous call
- KO4AGA
- FRN
- 0028916906
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Vanity availability
HeldCurrently held
K4COB 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
- Walker, JohnTNgranted 2019-11-21cancelled 2020-01-28
License history
0 eventsNo recorded events.