Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4DUQ callsign genealogy
Currently held by CLARK, H JAMES
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 N4DUQ's current licensee, walking backwards.
- CLARK, H JAMESNCgranted 2015-07-13cancelled 2015-08-18
Successor callsigns
Callsigns held now by people who previously held N4DUQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4DUQ, oldest first.
- CLARK, H JAMES NC1995-05-18 → cancelled 2002-04-18
- CLARK, H JAMES NC2015-08-18 active