Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1ULF callsign genealogy
Currently held by Jonsson 416, Ulf J
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 K1ULF's current licensee, walking backwards.
- Jonsson, Ulf JCTgranted 2007-10-24cancelled 2007-11-14
Successor callsigns
Callsigns held now by people who previously held K1ULF.
No current licensee on record previously held this callsign.