Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC1OF callsign genealogy
Currently held by CHRISTENSEN, GRAHAM S
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 AC1OF's current licensee, walking backwards.
- CHRISTENSEN, GRAHAM SMAgranted 2017-09-22cancelled 2023-01-09
Successor callsigns
Callsigns held now by people who previously held AC1OF.
- CHRISTENSEN, GRAHAM SMAgranted 2023-01-31