Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5ACI callsign genealogy
Currently held by SIMPSON, WILLIAM D
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 KF5ACI's current licensee, walking backwards.
- SIMPSON, WILLIAM DTXgranted 2009-02-24cancelled 2009-03-24
Successor callsigns
Callsigns held now by people who previously held KF5ACI.
- SIMPSON, WILLIAM DMOgranted 2014-12-09