Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4BO callsign genealogy
Currently held by DUVAL, MONTAGUE R
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 AB4BO's current licensee, walking backwards.
- KK4KRno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AB4BO.
- DUVAL, MONTAGUE RFLgranted 2005-03-08cancelled 2017-03-09