Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0MCJ callsign genealogy
Currently held by JOHNSTON, MICHAEL C
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 W0MCJ's current licensee, walking backwards.
- JOHNSTON, MICHAEL CMOgranted 1997-11-03cancelled 2001-06-12
Successor callsigns
Callsigns held now by people who previously held W0MCJ.
- JOHNSTON, MICHAEL CMOgranted 2019-08-03
All historical holders
Every license row we've seen with the callsign W0MCJ, oldest first.
- SADER, ALVIN C KS1987-08-25 → cancelled 1999-09-01
- JOHNSTON, MICHAEL C MO2011-04-19 → cancelled 2019-08-03