Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5COA callsign genealogy
Currently held by Abarca, Christian O
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 K5COA's current licensee, walking backwards.
- KI7BPNcancelledCOA Amateur Radio ServiceORgranted 2016-02-29cancelled 2016-10-04
Successor callsigns
Callsigns held now by people who previously held K5COA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5COA, oldest first.
- Abarca, Christian O TX2001-02-13 → cancelled 2013-02-14
- COA Amateur Radio Service OR2016-10-04 active