Confidence: Medium · Source: FCC ULS · As of 2026-09-09
WM4ST
ActiveTROMBA, MICHAEL S
- Location
- PORTSMOUTH, VA
- Class
- Amateur Extra
- Granted
- 2020-12-01
- Expires
- 2030-12-01
- Previous call
- KK4OXH
- FRN
- 0022478408
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Vanity availability
HeldCurrently held
WM4ST 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
- TROMBA, MICHAEL SVAgranted 2013-02-27cancelled 2020-12-01
License history
0 eventsNo recorded events.