Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX7RFB callsign genealogy
Currently held by Blumenthal, Robert F
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 KX7RFB's current licensee, walking backwards.
- Blumenthal, Robert FCAgranted 2020-01-24cancelled 2020-02-01
Successor callsigns
Callsigns held now by people who previously held KX7RFB.
No current licensee on record previously held this callsign.