Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5RTO callsign genealogy
Currently held by CHAPMAN, COLTON J
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 K5RTO's current licensee, walking backwards.
- Chapman, Colton JTXgranted 2010-11-09cancelled 2010-11-28
Successor callsigns
Callsigns held now by people who previously held K5RTO.
No current licensee on record previously held this callsign.