Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1SDM callsign genealogy
Currently held by LOCKE, EARLE L
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 N1SDM's current licensee, walking backwards.
- McCoy, Scott DNHgranted 2019-03-18cancelled 2023-01-24
Successor callsigns
Callsigns held now by people who previously held N1SDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1SDM, oldest first.
- LOCKE, EARLE L MA1994-07-07 → cancelled 2006-07-08
- McCoy, Scott D NH2023-01-24 active