Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1SJP callsign genealogy
Currently held by Pentkowski, Stanley J
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 W1SJP's current licensee, walking backwards.
- Pentkowski, Stanley JVTgranted 2007-09-18cancelled 2009-10-17
Successor callsigns
Callsigns held now by people who previously held W1SJP.
No current licensee on record previously held this callsign.