Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SLS callsign genealogy
Currently held by MASCHAL, ROBERT F
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 W4SLS's current licensee, walking backwards.
- Bishop, James DALgranted 2017-08-21cancelled 2018-02-03
Successor callsigns
Callsigns held now by people who previously held W4SLS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SLS, oldest first.
- MASCHAL, ROBERT F VA2005-03-28 → cancelled 2017-03-22
- Bishop, James D AL2018-02-03 active