Eleventh Supplemental Indenture Dated as of April 6, 2016Indenture • April 6th, 2016 • LouisianaTHIS ELEVENTH SUPPLEMENTAL INDENTURE is made as of the 6th day of April 2016, by and between CENTURYLINK, INC., a Louisiana corporation, having its principal office at 100 CenturyLink Drive, Monroe, Louisiana 71203 (the “Corporation”), and REGIONS BANK (successor-in-interest to First American Bank & Trust of Louisiana and Regions Bank of Louisiana), an Alabama state banking corporation, as trustee (the “Trustee”).