Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1ZP callsign genealogy
Currently held by SPITZER, VLAD G
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 W1ZP's current licensee, walking backwards.
- SPITZER, VLAD GCTgranted 2008-01-02cancelled 2008-04-18
Successor callsigns
Callsigns held now by people who previously held W1ZP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1ZP, oldest first.
- Kaplan, Donald MA2005-05-06 → cancelled 2005-10-08
- SPITZER, VLAD G FL2018-01-25 active