Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WY4ZMA callsign genealogy
Currently held by Herbert, Christopher D
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 WY4ZMA's current licensee, walking backwards.
- Herbert, Christopher DFLgranted 2021-05-06cancelled 2021-05-25
Successor callsigns
Callsigns held now by people who previously held WY4ZMA.
No current licensee on record previously held this callsign.