Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0MDX callsign genealogy
Currently held by Shiels, Mark 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 K0MDX's current licensee, walking backwards.
- Shiels, Mark DIAgranted 2013-11-26cancelled 2023-05-06
Successor callsigns
Callsigns held now by people who previously held K0MDX.
- Stanley, Matthew DMOgranted 2021-05-07
All historical holders
Every license row we've seen with the callsign K0MDX, oldest first.
- Stanley, Matthew D MO1999-06-10 → cancelled 2001-05-11
- Shiels, Mark D IA2023-05-06 active