Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4SS callsign genealogy
Currently held by Ponce-Montanez, Sofia 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 WP4SS's current licensee, walking backwards.
- Ponce-Montanez, Sofia CPRgranted 2015-11-03cancelled 2015-11-24
Successor callsigns
Callsigns held now by people who previously held WP4SS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4SS, oldest first.
- TORRES, JAIME S PR1998-09-01 → cancelled 2010-09-02
- Ponce-Montanez, Sofia C PR2015-11-24 active