Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4ABP callsign genealogy
Currently held by Birdwell, James T
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 KJ4ABP's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KJ4ABP.
- Birdwell, James TSCgranted 2007-10-22cancelled 2011-12-16