Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD1EO callsign genealogy
Currently held by COX, MARTIN 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 KD1EO's current licensee, walking backwards.
- COX, MARTIN WMAgranted 2025-11-25cancelled 2025-12-13
Successor callsigns
Callsigns held now by people who previously held KD1EO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD1EO, oldest first.
- COX, MARTIN W MA2013-01-08 → cancelled 2025-03-19
- COX, MARTIN W MA2025-12-13 active