Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SL callsign genealogy
Currently held by SOUTHEASTERN UNDERGROUND RADIO FELLOWSHIP
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 W4SL's current licensee, walking backwards.
- KJ4WFNcancelledTHE MIGHTY WONDERFUL RADIO OPERATORS OF ATLANTAGAgranted 2010-06-29cancelled 2010-07-20
Successor callsigns
Callsigns held now by people who previously held W4SL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SL, oldest first.
- CALDWELL, DAVID J VA1998-01-15 → cancelled 2003-06-07
- Upchurch, Roger D TN2005-06-28 → cancelled 2008-06-08
- SOUTHEASTERN UNDERGROUND RADIO FELLOWSHIP GA2020-04-24 active