Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA2YMR callsign genealogy
Currently held by FREDERICKSEN, JOHN C
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 KA2YMR's current licensee, walking backwards.
- Chamberlain, Kenneth JMIgranted 2023-10-24cancelled 2023-11-14
Successor callsigns
Callsigns held now by people who previously held KA2YMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA2YMR, oldest first.
- FREDERICKSEN, JOHN C NJ1994-10-04 → cancelled 2006-10-05
- Chamberlain, Kenneth J MI2023-11-14 active