Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4WAT callsign genealogy
Currently held by Irvin, Robert W
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 KM4WAT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM4WAT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4WAT, oldest first.
- Irvin, Robert W FL2016-08-16 → cancelled 2024-05-27
- Irvin, Katie D MD2025-01-28 active