Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4CHR callsign genealogy
Currently held by BLAIR, WILLIAM A
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 N4CHR's current licensee, walking backwards.
- ROBBINS II, CHARLES HNCgranted 2009-10-13cancelled 2010-05-25
Successor callsigns
Callsigns held now by people who previously held N4CHR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4CHR, oldest first.
- BLAIR, WILLIAM A SC1994-05-31 → cancelled 2006-06-01
- ROBBINS II, CHARLES H NC2010-05-25 → cancelled 2022-05-26