Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ATM callsign genealogy
Currently held by MARTIN, WILLIS P
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 K4ATM's current licensee, walking backwards.
- MARTIN, WILLIS PNCgranted 2003-02-24cancelled 2003-07-02
Successor callsigns
Callsigns held now by people who previously held K4ATM.
No current licensee on record previously held this callsign.