Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WW4WFU callsign genealogy
Currently held by MATTERN, JOSEPH E
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 WW4WFU's current licensee, walking backwards.
- MATTERN, JOSEPH EFLgranted 2001-06-07cancelled 2001-09-07
Successor callsigns
Callsigns held now by people who previously held WW4WFU.
- MATTERN, JOSEPH EFLgranted 2026-05-09