Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6FMZ callsign genealogy
Currently held by RIDDLE, LAURENCE G
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 W6FMZ's current licensee, walking backwards.
- RIDDLE, LAURENCE GCAgranted 2000-02-01cancelled 2000-03-17
Successor callsigns
Callsigns held now by people who previously held W6FMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6FMZ, oldest first.
- RIDDLE, GEORGE E CA1989-06-06 → cancelled 1998-04-12
- RIDDLE, LAURENCE G CA2020-01-07 active