Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3MRT callsign genealogy
Currently held by CLAWSON, MARTIN 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 W3MRT's current licensee, walking backwards.
- CLAWSON, MARTIN AARgranted 2014-09-04cancelled 2016-02-23
Successor callsigns
Callsigns held now by people who previously held W3MRT.
No current licensee on record previously held this callsign.