Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0ELR callsign genealogy
Currently held by Koehler, Douglas J
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 K0ELR's current licensee, walking backwards.
- KOEHLER, DOUGLAS JIAgranted 1991-09-17cancelled 2001-03-06
Successor callsigns
Callsigns held now by people who previously held K0ELR.
No current licensee on record previously held this callsign.