Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4IBT callsign genealogy
Currently held by MARTIN, MICHAEL M
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 W4IBT's current licensee, walking backwards.
- KF4MTBno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W4IBT.
No current licensee on record previously held this callsign.