Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JBW callsign genealogy
Currently held by Williams, John B
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 W4JBW's current licensee, walking backwards.
- Williams, John BFLgranted 2006-06-08cancelled 2010-01-20
Successor callsigns
Callsigns held now by people who previously held W4JBW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JBW, oldest first.
- GRIMES, HARLAN E KY1997-09-08 → cancelled 2009-09-09
- Williams, John B FL2019-12-10 active