Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NW9P callsign genealogy
Currently held by FIRCHOW JR, WILLIAM 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 NW9P's current licensee, walking backwards.
- WALGENBACH, NEIL EILgranted 2018-03-15cancelled 2019-12-13
Successor callsigns
Callsigns held now by people who previously held NW9P.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NW9P, oldest first.
- FIRCHOW JR, WILLIAM R WI2007-08-15 → cancelled 2019-10-10
- WALGENBACH, NEIL E IL2019-12-13 active