Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1PIO callsign genealogy
Currently held by WINTER, ALVIN 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 W1PIO's current licensee, walking backwards.
- Petrini, PioCAgranted 2008-05-20cancelled 2009-06-09
Successor callsigns
Callsigns held now by people who previously held W1PIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1PIO, oldest first.
- WINTER, ALVIN W CT1993-02-09 → cancelled 2005-02-10
- PETRINI, PIO CA2019-05-08 active