Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1CSM callsign genealogy
Currently held by McDonald, Christopher S
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 KA1CSM's current licensee, walking backwards.
- McDonald, Christopher SGAgranted 2020-10-19cancelled 2020-11-07
Successor callsigns
Callsigns held now by people who previously held KA1CSM.
- McDonald, Christopher SGAgranted 2021-03-16