Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KIR callsign genealogy
Currently held by Kirk, Matthew T
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 K4KIR's current licensee, walking backwards.
- Kirk, Matthew TFLgranted 2016-07-25cancelled 2016-08-30
Successor callsigns
Callsigns held now by people who previously held K4KIR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KIR, oldest first.
- MULLIGAN, ARTHUR F FL1994-03-01 → cancelled 2006-03-02
- Kirk, Matthew T FL2026-08-11 active