Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6RWU callsign genealogy
Currently held by MANSFIELD, JAMES H
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 W6RWU's current licensee, walking backwards.
- Ulshafer, Ronald WCAgranted 2013-08-01cancelled 2015-10-06
Successor callsigns
Callsigns held now by people who previously held W6RWU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6RWU, oldest first.
- MANSFIELD, JAMES H CA1996-04-05 → cancelled 2008-04-08
- Ulshafer, Ronald W OR2025-07-19 active