Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7IMB callsign genealogy
Currently held by WARTH, RICHARD D
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 K7IMB's current licensee, walking backwards.
- BECKSTROM, KIMBERLY JMTgranted 2015-04-23cancelled 2015-11-24
Successor callsigns
Callsigns held now by people who previously held K7IMB.
- WARTH, RICHARD DIDgranted 2003-12-05cancelled 2015-12-08
All historical holders
Every license row we've seen with the callsign K7IMB, oldest first.
- WARTH, RICHARD D ID2002-04-09 → cancelled 2003-12-05
- BECKSTROM, KIMBERLY J MT2026-04-03 active