Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA1ZTW callsign genealogy
Currently held by SEKELSKY SR, MARK C
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 WA1ZTW's current licensee, walking backwards.
- SEKELSKY SR, MARK CCTgranted 2021-09-15cancelled 2022-05-06
Successor callsigns
Callsigns held now by people who previously held WA1ZTW.
No current licensee on record previously held this callsign.