Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1FWS callsign genealogy
Currently held by GUERRIERO, RONALD 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 N1FWS's current licensee, walking backwards.
- Shoop, Frank WPAgranted 2019-11-22cancelled 2020-01-31
Successor callsigns
Callsigns held now by people who previously held N1FWS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1FWS, oldest first.
- GUERRIERO, RONALD R MA1998-07-08 → cancelled 2010-07-09
- Shoop, Frank W PA2020-01-31 active