Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4SR callsign genealogy
Currently held by PREWITT, JOE 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 KP4SR's current licensee, walking backwards.
- SOTO, WILFREDOPRgranted 1999-07-21cancelled 2008-11-01
Successor callsigns
Callsigns held now by people who previously held KP4SR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4SR, oldest first.
- PREWITT, JOE C FL1991-12-24 → cancelled 2001-08-30
- SOTO, WILFREDO PR2018-08-29 active