Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6MTZ callsign genealogy
Currently held by GREENWALD, HERBERT
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 W6MTZ's current licensee, walking backwards.
- Pike, Patrick Michael MCAgranted 2019-01-31cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held W6MTZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6MTZ, oldest first.
- GREENWALD, HERBERT CA2004-11-10 → cancelled 2017-02-01
- Pike, Patrick Michael M CA2019-02-20 active