Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N2SDG callsign genealogy
Currently held by BALSDON, GILBERT E
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 N2SDG's current licensee, walking backwards.
- Koehler, ChristophNMgranted 2026-06-13cancelled 2026-07-03
Successor callsigns
Callsigns held now by people who previously held N2SDG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N2SDG, oldest first.
- BALSDON, GILBERT E NY1992-08-04 → cancelled 2004-08-05
- Koehler, Christoph NM2026-07-03 active