Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0JJK callsign genealogy
Currently held by WALKER, ARTHUR M
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 N0JJK's current licensee, walking backwards.
- Geist, Todd ECOgranted 2010-02-09cancelled 2010-03-23
Successor callsigns
Callsigns held now by people who previously held N0JJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0JJK, oldest first.
- WALKER, ARTHUR M IA1988-05-31 → cancelled 2000-06-01
- Geist, Todd E CO2020-01-22 active