Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5BU callsign genealogy
Currently held by MARTINDALE, JAMES C
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 W5BU's current licensee, walking backwards.
- Cain, David ATXgranted 2014-09-17cancelled 2015-03-24
Successor callsigns
Callsigns held now by people who previously held W5BU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5BU, oldest first.
- MARTINDALE, JAMES C TN2009-03-03 → cancelled 2013-03-04
- CAIN, DAVID A TX2025-01-11 active