Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JCU callsign genealogy
Currently held by Underwood, Joshua C
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 K4JCU's current licensee, walking backwards.
- Underwood, Joshua CKYgranted 2018-02-09cancelled 2018-03-27
Successor callsigns
Callsigns held now by people who previously held K4JCU.
No current licensee on record previously held this callsign.