Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5DMM callsign genealogy
Currently held by Black, James 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 N5DMM's current licensee, walking backwards.
- Black, James MTXgranted 2018-01-19cancelled 2021-12-14
Successor callsigns
Callsigns held now by people who previously held N5DMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5DMM, oldest first.
- STOCK, FRANCIS L NM2001-11-07 → cancelled 2014-02-05
- Black, James M TX2021-12-14 active