Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5OBH callsign genealogy
Currently held by Roth, Mark 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 K5OBH's current licensee, walking backwards.
- Roth, Mark LOKgranted 2011-03-22cancelled 2012-10-27
Successor callsigns
Callsigns held now by people who previously held K5OBH.
No current licensee on record previously held this callsign.