Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ZYP callsign genealogy
Currently held by SNOW, MARK M
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 K4ZYP's current licensee, walking backwards.
- SNOW, MARK MALgranted 2015-04-17cancelled 2017-02-18
Successor callsigns
Callsigns held now by people who previously held K4ZYP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZYP, oldest first.
- WILKES, DONALD R AL1998-07-29 → cancelled 2010-07-30
- SNOW, MARK M AL2017-02-18 active