Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9OTR callsign genealogy
Currently held by Hoosier Am. Radio Digital Society
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 W9OTR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9OTR.
No current licensee on record previously held this callsign.