Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JLJ callsign genealogy
Currently held by Johnson, John L
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 K0JLJ's current licensee, walking backwards.
- Johnson, Jeffrey LCOgranted 2010-02-09cancelled 2010-04-23
Successor callsigns
Callsigns held now by people who previously held K0JLJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JLJ, oldest first.
- Johnson, John L MN2007-02-13 → cancelled 2007-04-27
- Johnson, Jeffrey L CO2021-05-19 active