Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7XX callsign genealogy
Currently held by KOCH, DARYL K
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 W7XX's current licensee, walking backwards.
- Koch, Daryl KAZgranted 2005-12-06cancelled 2008-02-22
Successor callsigns
Callsigns held now by people who previously held W7XX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7XX, oldest first.
- WHEELER, ARTHUR WA1996-08-08 → cancelled 2006-02-02
- KOCH, DARYL K AZ2017-12-19 active