AT&T Corp., Columbia, Maryland, was awarded a firm-fixed-price contract modification (P00012) with a face value of $12,080,764, to exercise Option Year Three of previously awarded sole-source contract HC1013-16-C-0001 for the Northstar Long-Haul Telecommunications Network and associated transmission circuits for an Ultra-High Frequency/Line of Sight communications system network. The modification is funded by fiscal 2019 operations and maintenance funds. Total cumulative face value of the contract is $56,131,776. Performance will be at various sites geographically dispersed across the continental U.S. The period of performance for this action is May 1, 2019, to April 30, 2020. The Defense Information Technology Contracting Organization, Scott Air Force Base, Illinois, is the contracting activity.