Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4AAT callsign genealogy
Currently held by Geng, Michael
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 W4AAT's current licensee, walking backwards.
- Geng, MichaelGAgranted 2000-12-21cancelled 2004-08-06
Successor callsigns
Callsigns held now by people who previously held W4AAT.
No current licensee on record previously held this callsign.