Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4ZDI callsign genealogy
Currently held by Day, Pierce B
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 W4ZDI's current licensee, walking backwards.
- Day, Pierce BGAgranted 2009-02-18cancelled 2009-04-10
Successor callsigns
Callsigns held now by people who previously held W4ZDI.
No current licensee on record previously held this callsign.