When did Frontier shut down?

Baldwin State Bank 1 Buckholts State Bank 2 FCN Bank National Association 7 First Bank of Owasso 3 FIRST GEN Bank 10 First Palmetto Bank 6 G. W. Jones Exchange Bank 8 Grandview Bank 12 GS&L Municipal Bank 5 Infinity Bank 7 Keystone Savings Bank 10 North Valley Bank 7 Partners Bank 10 PROGRESSIVE Bank 16 Security Bank of Texas 2 Simmesport State Bank 5 State Bank, Geneva 8 West Central Georgia Bank 12 WILSON B&TC 6 WoodTrust Bank 2