Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3SWT callsign genealogy
Currently held by Gienger, Grant
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 W3SWT's current licensee, walking backwards.
- Gienger, GrantWAgranted 2012-10-19cancelled 2021-04-23
Successor callsigns
Callsigns held now by people who previously held W3SWT.
No current licensee on record previously held this callsign.