Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7JJO callsign genealogy
Currently held by OLER, JEFFREY 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 K7JJO's current licensee, walking backwards.
- OLER, JEFFREY JWAgranted 2013-02-15cancelled 2013-03-05
Successor callsigns
Callsigns held now by people who previously held K7JJO.
No current licensee on record previously held this callsign.