Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1WJZ callsign genealogy
Currently held by Zaremba, William 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 W1WJZ's current licensee, walking backwards.
- Zaremba, William JMSgranted 2010-03-16cancelled 2011-09-10
Successor callsigns
Callsigns held now by people who previously held W1WJZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1WJZ, oldest first.
- WALKER, JAMES R MA1997-04-11 → cancelled 2009-04-14
- Zaremba, William J MS2021-06-25 active