Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4WBL callsign genealogy
Currently held by Curro, John 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 W4WBL's current licensee, walking backwards.
- Curro, John JSCgranted 2014-06-18cancelled 2015-11-13
Successor callsigns
Callsigns held now by people who previously held W4WBL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4WBL, oldest first.
- WINTERBERGER, HARLAN P KY2000-07-27 → cancelled 2012-10-17
- Curro, John J SC2015-11-13 active