Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7JRO callsign genealogy
Currently held by O'Brien, John R
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 K7JRO's current licensee, walking backwards.
- O'Brien, John RWAgranted 2015-12-08cancelled 2016-03-18
Successor callsigns
Callsigns held now by people who previously held K7JRO.
No current licensee on record previously held this callsign.