Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3ATN callsign genealogy
Currently held by COSTON, WILLIAM J
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 K3ATN's current licensee, walking backwards.
- Vatcher, ChristopherMDgranted 2018-09-25cancelled 2018-10-13
Successor callsigns
Callsigns held now by people who previously held K3ATN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3ATN, oldest first.
- COSTON, WILLIAM J MD1994-01-18 → cancelled 2006-01-19
- Vatcher, Christopher MD2018-10-13 active