Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SPZ callsign genealogy
Currently held by MARTINEAU, LAWRENCE 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 W4SPZ's current licensee, walking backwards.
- MARTINEAU, LAWRENCE DFLgranted 2006-12-14cancelled 2008-04-08
Successor callsigns
Callsigns held now by people who previously held W4SPZ.
No current licensee on record previously held this callsign.