Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SDI callsign genealogy
Currently held by GARLAND, 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 K4SDI's current licensee, walking backwards.
- GARLAND, MARK AKYgranted 1992-08-18cancelled 2001-01-23
Successor callsigns
Callsigns held now by people who previously held K4SDI.
No current licensee on record previously held this callsign.