Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7WTF callsign genealogy
Currently held by Warren Jr, James V
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 KJ7WTF's current licensee, walking backwards.
- McRoy, Collin MIDgranted 2014-11-14cancelled 2016-07-23
Successor callsigns
Callsigns held now by people who previously held KJ7WTF.
- Warren Jr, JamesWYgranted 2023-09-26
All historical holders
Every license row we've seen with the callsign KJ7WTF, oldest first.
- Warren Jr, James V WY2011-05-27 → cancelled 2012-07-20
- McRoy, Collin M ID2026-07-01 active