Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7OI callsign genealogy
Currently held by Crutchfield Jr, James 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 W7OI's current licensee, walking backwards.
- KALLAHER, KEN JFLgranted 2011-05-18cancelled 2016-07-29
Successor callsigns
Callsigns held now by people who previously held W7OI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7OI, oldest first.
- Crutchfield Jr, James A WA2004-04-19 → cancelled 2016-07-12
- KALLAHER, KEN J TX2026-05-12 active