Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JPA callsign genealogy
Currently held by CERMAK SR, JOSEPH 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 K4JPA's current licensee, walking backwards.
- ASTERITA, JOSEPH PNCgranted 1997-12-26cancelled 2005-06-04
Successor callsigns
Callsigns held now by people who previously held K4JPA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JPA, oldest first.
- CERMAK SR, JOSEPH R FL1989-05-23 → cancelled 2001-05-24
- ASTERITA, JOSEPH P NC2025-05-24 active