Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4IDY callsign genealogy
Currently held by CARGO, DAVID L
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 KC4IDY's current licensee, walking backwards.
- Nelson, Mary CSCgranted 2020-06-25cancelled 2026-06-30
Successor callsigns
Callsigns held now by people who previously held KC4IDY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4IDY, oldest first.
- CARGO, DAVID L FL1991-05-07 → cancelled 2003-05-08
- Nelson, Mary C SC2026-06-30 active