Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4IP callsign genealogy
Currently held by BLACKWELL, JOHNNIE L
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 AC4IP's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC4IP.
No current licensee on record previously held this callsign.