$Frontier电信(FTR)$ 8-K - Current report Filed: 2019-03-18 AccNo: 0001140361-19-005134 Size: 2 MBItem 1.01: Entry into a Material Definitive AgreementItem 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a RegistrantItem 9.01: Financial Statements and Exhibits 网页链接