Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4CLW callsign genealogy
Currently held by NICHOLAS, 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 WB4CLW's current licensee, walking backwards.
- Callihan, William RKYgranted 2008-08-12cancelled 2010-08-27
Successor callsigns
Callsigns held now by people who previously held WB4CLW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4CLW, oldest first.
- NICHOLAS, JOHN R GA1997-01-24 → cancelled 2009-01-27
- Callihan, William R KY2020-07-09 active