Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5KOS callsign genealogy
Currently held by Harrison, Allen 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 K5KOS's current licensee, walking backwards.
- Harrison, Allen RTXgranted 2019-04-04cancelled 2019-04-23
Successor callsigns
Callsigns held now by people who previously held K5KOS.
No current licensee on record previously held this callsign.