Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1IO callsign genealogy
Currently held by PENDLETON RADIO ASSN OF THE NORTH SHORE
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 W1IO's current licensee, walking backwards.
- PETRUFF JR, JOSEPH JAPgranted 2016-08-23cancelled 2020-01-07
Successor callsigns
Callsigns held now by people who previously held W1IO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1IO, oldest first.
- PENDLETON RADIO ASSN OF THE NORTH SHORE MA2007-12-18 → cancelled 2019-12-19
- PETRUFF JR, JOSEPH J AP2020-01-07 active