Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5LSB callsign genealogy
Currently held by Helm, Thomas J
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 K5LSB's current licensee, walking backwards.
- Helm, Thomas JTXgranted 2010-11-09cancelled 2011-06-18
Successor callsigns
Callsigns held now by people who previously held K5LSB.
No current licensee on record previously held this callsign.