Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4LOS callsign genealogy
Currently held by SIERRA FRANCO, LUIS 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 KP4LOS's current licensee, walking backwards.
- SIERRA FRANCO, LUIS OPRgranted 2023-04-18cancelled 2023-05-31
Successor callsigns
Callsigns held now by people who previously held KP4LOS.
No current licensee on record previously held this callsign.