Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4IDW callsign genealogy
Currently held by NAPIER, CHRISTOPHER 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 WB4IDW's current licensee, walking backwards.
- cancelled 1998-12-09
Successor callsigns
Callsigns held now by people who previously held WB4IDW.
No current licensee on record previously held this callsign.