Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9TOM callsign genealogy
Currently held by SPARROW, MARTIN J
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 KB9TOM's current licensee, walking backwards.
- SPARROW, MARTIN JILgranted 2021-10-14
Successor callsigns
Callsigns held now by people who previously held KB9TOM.
- SPARROW, MARTIN JILgranted 2021-10-14