Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AF4IX callsign genealogy
Currently held by KLINGMAN, KARL 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 AF4IX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AF4IX.
No current licensee on record previously held this callsign.