Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7ZZX callsign genealogy
Currently held by CHALFAN, JOHN 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 W7ZZX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W7ZZX.
No current licensee on record previously held this callsign.