Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC7DS callsign genealogy
Currently held by SIBBALD, LYLE E
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 AC7DS's current licensee, walking backwards.
- HOLMAN, DAVID AAZgranted 2004-03-12cancelled 2008-07-01
Successor callsigns
Callsigns held now by people who previously held AC7DS.
- SIBBALD, LYLE EAZgranted 2020-05-19
All historical holders
Every license row we've seen with the callsign AC7DS, oldest first.
- SIBBALD, LYLE E AZ1999-02-25 → cancelled 2000-07-01
- HOLMAN, DAVID A AL2018-05-19 active