Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SSR callsign genealogy
Currently held by KRULL, MICHAEL F
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 K4SSR's current licensee, walking backwards.
- KRULL, MICHAEL FGAgranted 2021-08-20cancelled 2021-10-30
Successor callsigns
Callsigns held now by people who previously held K4SSR.
No current licensee on record previously held this callsign.