Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SQC callsign genealogy
Currently held by KLUDT, JOHN R
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 K4SQC's current licensee, walking backwards.
- KLUDT, JOHN RIDgranted 2020-10-09
Successor callsigns
Callsigns held now by people who previously held K4SQC.
- KLUDT, JOHN RIDgranted 2020-10-09
All historical holders
Every license row we've seen with the callsign K4SQC, oldest first.
- PRESTON SR, MARSHALL M NC1988-12-06 → cancelled 2000-12-07
- KLUDT, JOHN R GA2011-11-18 → cancelled 2020-10-09