Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SQI callsign genealogy
Currently held by BLACKFORD, STEVEN 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 K4SQI's current licensee, walking backwards.
- BLACKFORD, STEVEN DNCgranted 2013-12-17cancelled 2016-08-05
Successor callsigns
Callsigns held now by people who previously held K4SQI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SQI, oldest first.
- REIGNER JR, WILLIAM M FL1997-05-07 → cancelled 2009-05-08
- BLACKFORD, STEVEN D NC2016-08-05 active