Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB7Z callsign genealogy
Currently held by Humphreys, Michael C
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 KB7Z's current licensee, walking backwards.
- HUMPHREYS, RUSSELL GWYgranted 2008-10-21cancelled 2016-05-17
Successor callsigns
Callsigns held now by people who previously held KB7Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB7Z, oldest first.
- Humphreys, Michael C WY2004-10-22 → cancelled 2014-06-10
- HUMPHREYS, RUSSELL G AZ2026-03-13 active