Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4DIY callsign genealogy
Currently held by BARCLAY JR, WILLIAM F
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 KC4DIY's current licensee, walking backwards.
- Parisi, Tyler JGAgranted 2021-04-30cancelled 2021-05-21
Successor callsigns
Callsigns held now by people who previously held KC4DIY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4DIY, oldest first.
- BARCLAY JR, WILLIAM F FL1989-02-21 → cancelled 2001-02-22
- Parisi, Tyler J GA2021-05-21 active