Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7ISA callsign genealogy
Currently held by Chow, Isaac
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 W7ISA's current licensee, walking backwards.
- Chow, IsaacWAgranted 2021-06-14cancelled 2021-07-02
Successor callsigns
Callsigns held now by people who previously held W7ISA.
No current licensee on record previously held this callsign.