Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4UPB callsign genealogy
Currently held by Crandall, Zachary A
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 KM4UPB'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 KM4UPB.
- Crandall, Zachary AKYgranted 2026-05-09