Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4IYC callsign genealogy
Currently held by Mills Sr, John I
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 KJ4IYC's current licensee, walking backwards.
- Mills Sr, John IVAgranted 2019-02-04cancelled 2021-07-09
Successor callsigns
Callsigns held now by people who previously held KJ4IYC.
- Mills Sr, John IVAgranted 2019-02-04cancelled 2021-07-09
All historical holders
Every license row we've seen with the callsign KJ4IYC, oldest first.
- Mills Sr, John I VA2009-01-16 → cancelled 2009-02-13
- Mills Sr, John I VA2021-07-09 active