Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4MZY callsign genealogy
Currently held by HOLCOMB JR, SIGMOND W
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 K4MZY's current licensee, walking backwards.
- Holcomb Jr, Sigmond WNCgranted 2013-07-25cancelled 2013-08-16
Successor callsigns
Callsigns held now by people who previously held K4MZY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MZY, oldest first.
- HOLCOMB SR, SIGMOND W NC1997-02-25 → cancelled 2009-02-26
- HOLCOMB JR, SIGMOND W NC2013-08-16 → cancelled 2025-08-19