Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB5CD callsign genealogy
Currently held by WALKER, CHARLES F
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 AB5CD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AB5CD.
- Denmark, Courtney SMSgranted 2025-12-09
All historical holders
Every license row we've seen with the callsign AB5CD, oldest first.
- WALKER, CHARLES F TX2011-10-22 → cancelled 2023-10-24
- Denmark, Courtney S MS2025-06-03 → cancelled 2025-12-09