Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4SGF callsign genealogy
Currently held by On The Air Of Puerto Rico
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 WP4SGF'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 WP4SGF.
- KP4OTAactiveOn The Air Of Puerto RicoPRgranted 2022-04-23