Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7KRT callsign genealogy
Currently held by KARTCHNER, KAMM
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 W7KRT's current licensee, walking backwards.
- KARTCHNER, KAMMUTgranted 2019-10-17cancelled 2019-11-08
Successor callsigns
Callsigns held now by people who previously held W7KRT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7KRT, oldest first.
- CRUMRINE, GILBERT L WY1996-04-19 → cancelled 2008-04-22
- KARTCHNER, KAMM WY2019-11-08 active