Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7JDT callsign genealogy
Currently held by TARNOW, JEFFREY 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 K7JDT's current licensee, walking backwards.
- TARNOW, JEFFREY DWAgranted 2010-11-17cancelled 2014-08-23
Successor callsigns
Callsigns held now by people who previously held K7JDT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7JDT, oldest first.
- ALBERTSON, DOUGLAS E AZ1998-10-27 → cancelled 2010-10-28
- TARNOW, JEFFREY D WA2024-06-11 active