Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WM3U callsign genealogy
Currently held by CRUMP, MARY K
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by WM3U's current licensee, walking backwards.
- DEMYAN, JOHN EMDgranted 2012-07-27cancelled 2013-08-06
Successor callsigns
Callsigns held now by people who previously held WM3U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WM3U, oldest first.
- CRUMP, MARY K WV2001-07-24 → cancelled 2013-07-17
- DEMYAN, JOHN E MD2023-12-23 active