Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SIP callsign genealogy
Currently held by FELTS, BYRON D
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 K4SIP's current licensee, walking backwards.
- FELTS, BYRON DFLgranted 2015-01-30cancelled 2015-02-20
Successor callsigns
Callsigns held now by people who previously held K4SIP.
No current licensee on record previously held this callsign.