Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5ZAP callsign genealogy
Currently held by WOLF, JOHN 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 W5ZAP's current licensee, walking backwards.
- Perez, Michael RTXgranted 2008-06-10cancelled 2008-10-15
Successor callsigns
Callsigns held now by people who previously held W5ZAP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5ZAP, oldest first.
- WOLF, JOHN W LA1996-06-18 → cancelled 2008-06-19
- PEREZ, MICHAEL R SD2018-07-31 active