Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5THW callsign genealogy
Currently held by Klein, Max E
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 KC5THW's current licensee, walking backwards.
- KLEIN, MAX ETXgranted 1996-03-12cancelled 2000-10-13
Successor callsigns
Callsigns held now by people who previously held KC5THW.
All historical holders
Every license row we've seen with the callsign KC5THW, oldest first.
- KLEIN, MAX E TX1996-03-12 → cancelled 2000-09-20
- Klein, Max E AZ2010-10-13 → cancelled 2014-10-17