Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5SDL callsign genealogy
Currently held by London, Stephen D
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 KF5SDL's current licensee, walking backwards.
- London, Stephen DLAgranted 2010-06-04cancelled 2010-11-05
Successor callsigns
Callsigns held now by people who previously held KF5SDL.
- London, Stephen DLAgranted 2010-11-28cancelled 2012-12-28