Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4ROG callsign genealogy
Currently held by MASON, ROBERT 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 WD4ROG's current licensee, walking backwards.
- James Jr, Roger LALgranted 2024-06-26cancelled 2025-02-08
Successor callsigns
Callsigns held now by people who previously held WD4ROG.
- MASON, ROBERT EFLgranted 1998-04-22cancelled 2006-09-08
All historical holders
Every license row we've seen with the callsign WD4ROG, oldest first.
- MASON, ROBERT E FL2006-09-08 → cancelled 2018-09-11
- James Jr, Roger L AL2025-02-08 active
- MASON, ROBERT E— → cancelled 1998-04-22