Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4RSN callsign genealogy
Currently held by Hall, Andrew
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 KO4RSN's current licensee, walking backwards.
- Hall, Andrew BSCgranted 2021-08-14cancelled 2021-11-09
Successor callsigns
Callsigns held now by people who previously held KO4RSN.
- Hall, Andrew BSCgranted 2021-08-14cancelled 2021-11-09
All historical holders
Every license row we've seen with the callsign KO4RSN, oldest first.
- Hall, Andrew B SC2021-07-07 → cancelled 2021-08-14
- Hall, Andrew SC2021-11-09 active