Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1CO callsign genealogy
Currently held by RIEDERS, ARTHUR T
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 W1CO's current licensee, walking backwards.
- ORourke, Joseph EMAgranted 1997-03-25cancelled 2006-08-18
Successor callsigns
Callsigns held now by people who previously held W1CO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1CO, oldest first.
- RIEDERS, ARTHUR T MA1996-12-11 → cancelled 2004-07-28
- OROURKE, JOSEPH E MA2016-05-23 active