Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM7GKU callsign genealogy
Currently held by Allingham, John W
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 KM7GKU's current licensee, walking backwards.
- Allingham, John WWAgranted 2026-06-10cancelled 2026-08-11
Successor callsigns
Callsigns held now by people who previously held KM7GKU.
- Allingham, John WWAgranted 2026-06-10cancelled 2026-08-11
All historical holders
Every license row we've seen with the callsign KM7GKU, oldest first.
- Allingham, John W WA2026-06-10 → cancelled 2026-07-21
- Allingham, John W WA2026-08-11 active