Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4CPZ callsign genealogy
Currently held by WESTBROOKS, MICHAEL T
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 W4CPZ's current licensee, walking backwards.
- WESTBROOKS, MICHAEL TSCgranted 2019-04-26cancelled 2019-05-18
Successor callsigns
Callsigns held now by people who previously held W4CPZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4CPZ, oldest first.
- WESTBROOKS, JOHN R SC1993-01-19 → cancelled 2005-01-20
- WESTBROOKS, MICHAEL T SC2019-05-18 active