Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NB9A callsign genealogy
Currently held by BUTMAN, HAROLD W
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 NB9A's current licensee, walking backwards.
- Vail, Christopher JILgranted 2009-02-26cancelled 2011-03-29
Successor callsigns
Callsigns held now by people who previously held NB9A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB9A, oldest first.
- BUTMAN, HAROLD W FL1997-01-31 → cancelled 2009-02-03
- Vail, Christopher J IL2020-12-30 active