Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ISR callsign genealogy
Currently held by WOODS, MICKEY A
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 K4ISR's current licensee, walking backwards.
- KAISER JR, MICHAEL JFLgranted 2014-11-04cancelled 2015-03-10
Successor callsigns
Callsigns held now by people who previously held K4ISR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ISR, oldest first.
- WOODS, MICKEY A GA1988-03-15 → cancelled 2000-03-16
- KAISER JR, MICHAEL J FL2025-03-05 active