Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5MLB callsign genealogy
Currently held by ZIMMERMANN, LUKE 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 W5MLB's current licensee, walking backwards.
- Burke, Michael LTXgranted 2018-07-14cancelled 2019-06-01
Successor callsigns
Callsigns held now by people who previously held W5MLB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5MLB, oldest first.
- ZIMMERMANN, LUKE A TX2004-03-16 → cancelled 2016-03-17
- Burke, Michael L TX2019-06-01 active