Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4AJA callsign genealogy
Currently held by ABREU, MARK A
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 W4AJA's current licensee, walking backwards.
- ABREU, MARK ANCgranted 2009-02-11cancelled 2009-03-07
Successor callsigns
Callsigns held now by people who previously held W4AJA.
No current licensee on record previously held this callsign.