Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4RUN callsign genealogy
Currently held by San Lorenzo Ham Radio Club
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 WP4RUN's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WP4RUN.
- KP4SRCactiveSan Lorenzo Ham Radio ClubPRgranted 2021-06-15