Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0MKM callsign genealogy
Currently held by EASTHAM, JEWELL H
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 W0MKM's current licensee, walking backwards.
- Morgenthaler, Matthew KCOgranted 2021-04-19cancelled 2021-05-07
Successor callsigns
Callsigns held now by people who previously held W0MKM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0MKM, oldest first.
- EASTHAM, JEWELL H MO1994-03-15 → cancelled 2006-03-16
- Morgenthaler, Matthew K CO2021-05-07 active