Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NK0Y callsign genealogy
Currently held by ST JOHN, DONALD R
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 NK0Y's current licensee, walking backwards.
- WARDLE JR, ERIC MMOgranted 2020-08-31cancelled 2022-04-15
Successor callsigns
Callsigns held now by people who previously held NK0Y.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NK0Y, oldest first.
- ST JOHN, DONALD R CO2010-03-26 → cancelled 2022-03-29
- WARDLE JR, ERIC M MO2022-04-15 active