Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4MKM callsign genealogy
Currently held by Mattox, Matt K
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 W4MKM's current licensee, walking backwards.
- Mattox, Matt KTNgranted 2021-03-01cancelled 2021-03-19
Successor callsigns
Callsigns held now by people who previously held W4MKM.
- MILLER, MILTON KNCgranted 2021-01-11
All historical holders
Every license row we've seen with the callsign W4MKM, oldest first.
- MILLER, MILTON K NC1999-06-02 → cancelled 2001-04-03
- Mattox, Matt K TN2021-03-19 active