Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7JB callsign genealogy
Currently held by MANDELL, MARVIN 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 KC7JB's current licensee, walking backwards.
- BLATTNER, JAMES MWAgranted 2008-09-09cancelled 2015-04-21
Successor callsigns
Callsigns held now by people who previously held KC7JB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7JB, oldest first.
- MANDELL, MARVIN B AZ1998-12-10 → cancelled 2010-12-11
- BLATTNER, JAMES M WA2025-03-04 active