Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZD callsign genealogy
Currently held by HANRAHAN, ROBERT L
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 K4ZD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4ZD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZD, oldest first.
- HANRAHAN, ROBERT L GA2006-08-08 → cancelled 2013-05-25
- Phillips, William M GA2025-04-30 active