Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB0CR callsign genealogy
Currently held by RAMSDELL, DENNY B
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 AB0CR's current licensee, walking backwards.
- FONTES, SONNY JKSgranted 2012-06-20cancelled 2021-05-21
Successor callsigns
Callsigns held now by people who previously held AB0CR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB0CR, oldest first.
- RAMSDELL, DENNY B ND2002-02-07 → cancelled 2014-05-06
- FONTES, SONNY J KS2021-05-21 active