Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AB7SL callsign genealogy
Currently held by JOHNSTON, CHARLES T
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 AB7SL's current licensee, walking backwards.
- KC7LDWno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AB7SL.
- JOHNSTON, CHARLIECOgranted 2005-03-01cancelled 2011-03-16