Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB0IV callsign genealogy
Currently held by Tolivar, Michael D
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 AB0IV's current licensee, walking backwards.
- TOLIVAR, MICHAEL Dcancelled 1999-06-15
Successor callsigns
Callsigns held now by people who previously held AB0IV.
No current licensee on record previously held this callsign.