Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7JOS callsign genealogy
Currently held by Castilleja, Joseph R
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 W7JOS's current licensee, walking backwards.
- Castilleja, Joseph RWAgranted 2018-03-28cancelled 2018-04-17
Successor callsigns
Callsigns held now by people who previously held W7JOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7JOS, oldest first.
- NEWCOMBE, CHARLES B NV1998-06-08 → cancelled 2010-06-09
- Castilleja, Joseph R WA2018-04-17 active