Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW5U callsign genealogy
Currently held by OLDHAM, WILLIAM J
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 WW5U's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WW5U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WW5U, oldest first.
- OLDHAM, WILLIAM J MS1997-01-07 → cancelled 2009-01-08
- Mentzer, Walter J TX2020-02-08 active