Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WK0I callsign genealogy
Currently held by PARKER, TERRY 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 WK0I's current licensee, walking backwards.
- Coelho III, John MCAgranted 2001-08-17cancelled 2006-12-27
Successor callsigns
Callsigns held now by people who previously held WK0I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WK0I, oldest first.
- PARKER, TERRY J IA1998-04-01 → cancelled 1998-11-14
- Coelho, John M CO2016-10-19 active