Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4CDC callsign genealogy
Currently held by Collum, Calder 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 K4CDC's current licensee, walking backwards.
- Collum, Calder DGAgranted 2016-03-17cancelled 2016-12-13
Successor callsigns
Callsigns held now by people who previously held K4CDC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4CDC, oldest first.
- SMITH, ONETA F NC2004-07-27 → cancelled 2016-10-22
- Collum, Calder D GA2016-12-13 active