Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4YYO callsign genealogy
Currently held by Cram, James 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 KM4YYO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KM4YYO.
- Cram, James BGAgranted 2017-03-20cancelled 2018-06-12