Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WU4PUU callsign genealogy
Currently held by ULLBERG, PHYLLIS M
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 WU4PUU's current licensee, walking backwards.
- ULLBERG, PHYLLIS MTXgranted 2005-03-04cancelled 2008-03-28
Successor callsigns
Callsigns held now by people who previously held WU4PUU.
No current licensee on record previously held this callsign.