Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5UMB callsign genealogy
Currently held by Gilmer, Thomas 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 N5UMB's current licensee, walking backwards.
- GILMER, THOMAS ATXgranted 2014-08-27cancelled 2014-09-16
Successor callsigns
Callsigns held now by people who previously held N5UMB.
- GARCIA, GERALD WTXgranted 2022-02-07
All historical holders
Every license row we've seen with the callsign N5UMB, oldest first.
- GARCIA, GERALD W TX1991-10-29 → cancelled 2002-03-06
- Gilmer, Thomas A TX2024-09-20 active