Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4CPA callsign genealogy
Currently held by ESTES, WILLIAM B
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 N4CPA's current licensee, walking backwards.
- CLARK, DUANE ATNgranted 2003-03-18cancelled 2007-03-20
- KD4CVQno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N4CPA.
- ESTES, WILLIAM BGAgranted 2003-02-25cancelled 2003-11-25
All historical holders
Every license row we've seen with the callsign N4CPA, oldest first.
- ESTES, WILLIAM B GA2000-01-25 → cancelled 2003-02-25
- CLARK, DUANE A TN2017-01-04 active