Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7ZTZ callsign genealogy
Currently held by KARPENSKE, DAVID S
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 W7ZTZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W7ZTZ.
- KARPENSKE, DAVID SWAgranted 2020-09-26