Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1DUC callsign genealogy
Currently held by MERK, JOHN F
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 N1DUC's current licensee, walking backwards.
- Cassone, Junie HCTgranted 2019-12-12cancelled 2020-05-22
Successor callsigns
Callsigns held now by people who previously held N1DUC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1DUC, oldest first.
- MERK, JOHN F MA1995-07-28 → cancelled 2007-07-29
- Cassone, Junie H MS2020-05-22 active