Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4Z callsign genealogy
Currently held by COFFEY JR, MICHAEL L
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 KJ4Z's current licensee, walking backwards.
- COFFEY JR, MICHAEL LTNgranted 1995-05-01cancelled 2000-12-23
Successor callsigns
Callsigns held now by people who previously held KJ4Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4Z, oldest first.
- PETTIT, THOMAS L AL1988-11-22 → cancelled 2000-11-28
- COFFEY JR, MICHAEL L WA2020-09-25 active