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- AMATEUR RADIO LICENSE SEARCH
Callsign: KR4NWN
Class: Extra
Name: Cepeda Rubio, Mario Francisco Je
City: Knoxville
State: TN
Zipcode: 37934
Status: Active
Grant Date: 07/25/2026
Expires: 07/25/2036
Uls: FCC Info
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Ham Callsigns search - version 2.1