Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0ZIO callsign genealogy
Currently held by LONG SR, WILLIAM H
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 W0ZIO's current licensee, walking backwards.
- ACHTEMICHUK, THOMAS MMAgranted 2016-07-21cancelled 2016-08-09
Successor callsigns
Callsigns held now by people who previously held W0ZIO.
- ACHTEMICHUK, THOMAS MMEgranted 2017-07-29
All historical holders
Every license row we've seen with the callsign W0ZIO, oldest first.
- LONG SR, WILLIAM H MO1996-02-05 → cancelled 2008-02-06
- ACHTEMICHUK, THOMAS M MA2016-08-09 → cancelled 2017-07-29