Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4OOP callsign genealogy
Currently held by Dittman, Matthew F
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 W4OOP's current licensee, walking backwards.
- Dittman, Matthew FTXgranted 2016-05-10cancelled 2016-06-18
Successor callsigns
Callsigns held now by people who previously held W4OOP.
- Abernathy Sr, James DTXgranted 2001-10-10cancelled 2013-10-11
All historical holders
Every license row we've seen with the callsign W4OOP, oldest first.
- ABERNATHY SR, JAMES D TX1997-03-26 → cancelled 2001-10-10
- Dittman, Matthew F TX2026-04-02 active