Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WD9IKO callsign genealogy
Currently held by PATTERSON, DAVID 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 WD9IKO's current licensee, walking backwards.
- Patterson, Andrew CMIgranted 2012-04-25cancelled 2018-10-05
Successor callsigns
Callsigns held now by people who previously held WD9IKO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD9IKO, oldest first.
- PATTERSON, DAVID R WI2005-03-01 → cancelled 2017-05-04
- Patterson, Andrew C MI2018-10-05 active