Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0RXX callsign genealogy
Currently held by RICHTENBURG, DONALD C
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 W0RXX's current licensee, walking backwards.
- RICHTENBURG, DONALD CCAgranted 2025-07-30
Successor callsigns
Callsigns held now by people who previously held W0RXX.
All historical holders
Every license row we've seen with the callsign W0RXX, oldest first.
- RICHTENBURG, DONALD C CA2006-05-24 → cancelled 2008-04-25
- RICHTENBURG, DONALD C CA2009-11-14 → cancelled 2013-11-20