The medusa ransomware group listed Presort First Class on its data leak site on 2025-06-01. Country: US Sector: Professional Services Domains named: presortfirstclass.com Claim as published on the leak site: Presort First Class - offer a complete array of design, print, and mail services. Presort First Class corporate office is located in 2621 SE 15th St, Oklahoma City, Oklahoma, 73129, United States and has 85 employees. The total amount of data leakage is 279.30 GB