Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8AMS callsign genealogy
Currently held by Sper, Andrew M
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 K8AMS's current licensee, walking backwards.
- Sper, Andrew MOHgranted 2015-02-11cancelled 2017-03-20
Successor callsigns
Callsigns held now by people who previously held K8AMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8AMS, oldest first.
- UNDERWOOD SR, WILLIAM L WV1998-01-23 → cancelled 2010-01-26
- Sper, Andrew M OH2017-03-20 active