Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB3TA callsign genealogy
Currently held by Helmke, Martin F
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 AB3TA's current licensee, walking backwards.
- Helmke, Martin FPAgranted 2013-06-26cancelled 2013-08-28
Successor callsigns
Callsigns held now by people who previously held AB3TA.
- Helmke, Martin FPAgranted 2025-03-14