Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW4AS callsign genealogy
Currently held by SIERRA, ALBERTO A
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 WW4AS's current licensee, walking backwards.
- SIERRA, ALBERTO AFLgranted 1999-03-12cancelled 2004-03-31
Successor callsigns
Callsigns held now by people who previously held WW4AS.
No current licensee on record previously held this callsign.