Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5HDX callsign genealogy
Currently held by Callahan, Christopher C
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 W5HDX's current licensee, walking backwards.
- Callahan, Christopher CTXgranted 2026-08-08
Successor callsigns
Callsigns held now by people who previously held W5HDX.
- Callahan, Christopher CTXgranted 2026-08-08