Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3OIO callsign genealogy
Currently held by COOPERSBURG ARC
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 K3OIO's current licensee, walking backwards.
- KB3PROcancelledCOOPERSBURG ARCPAgranted 2007-09-06cancelled 2007-10-05
Successor callsigns
Callsigns held now by people who previously held K3OIO.
No current licensee on record previously held this callsign.