Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NG4D callsign genealogy
Currently held by Caldwell, Donald D
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 NG4D's current licensee, walking backwards.
- Caldwell, Donald DNCgranted 2005-10-18cancelled 2008-06-06
Successor callsigns
Callsigns held now by people who previously held NG4D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NG4D, oldest first.
- CRAIG, C D NC1996-05-17 → cancelled 2008-05-20
- Caldwell, Donald D NC2018-03-13 active