Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1TZ callsign genealogy
Currently held by KATZ, WILLIAM M
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 KA1TZ's current licensee, walking backwards.
- KATZ, WILLIAM MCAgranted 2017-08-09cancelled 2024-09-28
Successor callsigns
Callsigns held now by people who previously held KA1TZ.
No current licensee on record previously held this callsign.