Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC7YU callsign genealogy
Currently held by Johnson, Karl J
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 AC7YU's current licensee, walking backwards.
- Johnson, Karl JUTgranted 2002-12-17cancelled 2003-06-16
Successor callsigns
Callsigns held now by people who previously held AC7YU.
No current licensee on record previously held this callsign.