Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9TWH callsign genealogy
Currently held by HARTOIN, THOMAS W
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 W9TWH's current licensee, walking backwards.
- HARTOIN, THOMAS WINgranted 2003-07-23cancelled 2013-02-20
Successor callsigns
Callsigns held now by people who previously held W9TWH.
No current licensee on record previously held this callsign.