Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NA1BK callsign genealogy
Currently held by KLEINHOFER, WILLIAM C
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 NA1BK's current licensee, walking backwards.
- KLEINHOFER, WILLIAM CCTgranted 2005-01-12cancelled 2007-01-04
Successor callsigns
Callsigns held now by people who previously held NA1BK.
No current licensee on record previously held this callsign.