Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6BST callsign genealogy
Currently held by ROSENTHAL, MARK A
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 W6BST's current licensee, walking backwards.
- ROSENTHAL, MARK ACAgranted 2005-12-28cancelled 2008-11-01
Successor callsigns
Callsigns held now by people who previously held W6BST.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6BST, oldest first.
- PETERS, RLEE H CA1996-08-05 → cancelled 2008-08-06
- ROSENTHAL, MARK A CA2018-08-15 active