Confidence: Medium · Source: FCC ULS · As of 2026-09-10
K4MRB
ActiveButler, Thomas R
- Location
- RALEIGH, NC
- Class
- General
- Granted
- 2020-07-03
- Expires
- 2030-07-03
- Previous call
- KO4EGS
- FRN
- 0029653243
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Vanity availability
HeldCurrently held
K4MRB 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 →License history
0 eventsNo recorded events.