Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KQ0J callsign genealogy
Currently held by SHEFFIELD JR, WILLIAM 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 KQ0J's current licensee, walking backwards.
- Bahl, Joel ANEgranted 2003-03-20cancelled 2008-06-06
Successor callsigns
Callsigns held now by people who previously held KQ0J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KQ0J, oldest first.
- SHEFFIELD JR, WILLIAM M CO1995-04-04 → cancelled 2002-02-11
- Bahl, Joel A FL2018-03-20 active