Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0AT callsign genealogy
Currently held by Hammerstrom, Eric D
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 W0AT's current licensee, walking backwards.
- Hammerstrom, Eric DIAgranted 2019-01-31cancelled 2020-05-15
Successor callsigns
Callsigns held now by people who previously held W0AT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0AT, oldest first.
- ATKEISSON, ROBERT A KS2010-08-23 → cancelled 2018-04-26
- Hammerstrom, Eric D IA2020-05-15 active