Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SOG callsign genealogy
Currently held by SURRETSKY, LAWRENCE J
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 K4SOG's current licensee, walking backwards.
- KN4FNHcancelledSTUDIES AND OBSERVATIONS GROUPNCgranted 2017-08-24cancelled 2017-09-16
Successor callsigns
Callsigns held now by people who previously held K4SOG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SOG, oldest first.
- SURRETSKY, LAWRENCE J NC2001-09-05 → cancelled 2013-11-05
- STUDIES AND OBSERVATIONS GROUP NC2017-09-16 active