Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4CIO callsign genealogy
Currently held by Parente, Mark 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 K4CIO's current licensee, walking backwards.
- Parente, Mark RFLgranted 2003-10-15cancelled 2003-11-07
Successor callsigns
Callsigns held now by people who previously held K4CIO.
No current licensee on record previously held this callsign.