Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4UJB callsign genealogy
Currently held by McCarthy, Richard 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 KM4UJB's current licensee, walking backwards.
- McCarthy, Richard SGAgranted 2016-01-26cancelled 2016-06-01
Successor callsigns
Callsigns held now by people who previously held KM4UJB.
- McCarthy, RichardGAgranted 2016-06-24