Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4MCO callsign genealogy
Currently held by Young, Sean B
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 K4MCO's current licensee, walking backwards.
- Young, Sean BVAgranted 2002-07-01cancelled 2002-12-03
Successor callsigns
Callsigns held now by people who previously held K4MCO.
No current licensee on record previously held this callsign.