Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4SF callsign genealogy
Currently held by RATTZ, WAYNE O
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 AC4SF's current licensee, walking backwards.
- KO4XAno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AC4SF.
- RATTZ, WAYNE OFLgranted 2017-07-26