Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0HRL callsign genealogy
Currently held by EULER, WILLIAM D
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 K0HRL's current licensee, walking backwards.
- Cromwell, John RCOgranted 2017-08-23cancelled 2020-05-08
Successor callsigns
Callsigns held now by people who previously held K0HRL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0HRL, oldest first.
- EULER, WILLIAM D MO1993-11-30 → cancelled 2005-12-01
- Cromwell, John R CO2020-05-08 active