Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1SA callsign genealogy
Currently held by Greenwald, Benjamin E
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 AB1SA's current licensee, walking backwards.
- Greenwald, Benjamin EMAgranted 2011-12-21cancelled 2012-10-16
Successor callsigns
Callsigns held now by people who previously held AB1SA.
No current licensee on record previously held this callsign.