Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ATP callsign genealogy
Currently held by MCCLAIN, ROBERT 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 K4ATP's current licensee, walking backwards.
- McClain, Robert JVAgranted 1996-05-01cancelled 2004-03-26
Successor callsigns
Callsigns held now by people who previously held K4ATP.
No current licensee on record previously held this callsign.