Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9SP callsign genealogy
Currently held by CHAPMAN, DOUGLAS W
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 AC9SP's current licensee, walking backwards.
- CHAPMAN, DOUGLAS WINgranted 2018-02-20cancelled 2018-04-09
Successor callsigns
Callsigns held now by people who previously held AC9SP.
- CHAPMAN, DOUGNHgranted 2018-06-23