Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB7U callsign genealogy
Currently held by SULLIVAN, JOHN K
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 WB7U's current licensee, walking backwards.
- NUNLEY III, JOHN FWYgranted 2016-09-08cancelled 2019-03-26
Successor callsigns
Callsigns held now by people who previously held WB7U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB7U, oldest first.
- SULLIVAN, JOHN K UT2008-02-26 → cancelled 2019-03-08
- NUNLEY III, JOHN F WY2019-03-26 active