Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB1HI callsign genealogy
Currently held by Shapiro, Jonathan S
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 AB1HI'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 AB1HI.
- Shapiro PhD, Jonathan SCTgranted 2021-01-08cancelled 2026-01-03