Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4CI callsign genealogy
Currently held by Sambolin, Alfredo
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 KP4CI's current licensee, walking backwards.
- SAMBOLIN, ROBERT MPRgranted 2000-07-11cancelled 2009-10-20
Successor callsigns
Callsigns held now by people who previously held KP4CI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4CI, oldest first.
- Sambolin, Alfredo PR2004-05-17 → cancelled 2005-03-04
- SAMBOLIN, ROBERT M IN2019-08-06 active