Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1TW callsign genealogy
Currently held by Balamuth, Michael L
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 AB1TW's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AB1TW.
- Balamuth, Michael LNHgranted 2014-01-25cancelled 2026-03-07