Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4ID callsign genealogy
Currently held by DONNELLY, DAVID 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 KO4ID's current licensee, walking backwards.
- DONNELLY, DAVID WMDgranted 2016-01-22cancelled 2017-09-29
Successor callsigns
Callsigns held now by people who previously held KO4ID.
- DONNELLY, DAVID WMDgranted 2016-01-22cancelled 2017-09-29
All historical holders
Every license row we've seen with the callsign KO4ID, oldest first.
- DONNELLY, DAVID W MD2012-05-30 → cancelled 2016-01-22
- DONNELLY, DAVID W MD2017-09-29 active