Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1THV callsign genealogy
Currently held by Johnson, Olof
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 W1THV's current licensee, walking backwards.
- Johnson, OlofMAgranted 2011-06-03cancelled 2011-07-12
Successor callsigns
Callsigns held now by people who previously held W1THV.
No current licensee on record previously held this callsign.