Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ5O callsign genealogy
Currently held by Cotton, Joseph L
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 KJ5O's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KJ5O.
No current licensee on record previously held this callsign.