Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1IOS callsign genealogy
Currently held by Ehrlich, Henry 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 KB1IOS's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KB1IOS.
- Ehrlich, Henry JNYgranted 2022-04-05