Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KC0LS callsign genealogy
Currently held by HAZEN, WALTER E
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 KC0LS's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC0LS.
- Stambaugh, Larry JIAgranted 2021-03-12
All historical holders
Every license row we've seen with the callsign KC0LS, oldest first.
- HAZEN, WALTER E CO2007-05-09 → cancelled 2019-07-18
- Stambaugh, Larry J IA2020-12-05 → cancelled 2021-03-12