Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TTP callsign genealogy
Currently held by VITZTHUM, SCOTT A
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 K0TTP's current licensee, walking backwards.
- VITZTHUM, SCOTT AIAgranted 2017-05-17cancelled 2020-11-20
Successor callsigns
Callsigns held now by people who previously held K0TTP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0TTP, oldest first.
- SEWING, DAROLD D IA1995-06-13 → cancelled 2007-06-14
- VITZTHUM, SCOTT A IA2020-11-20 active