1 EXHIBIT 4.15 FOURTH SUPPLEMENTAL INDENTURE Fourth Supplemental Indenture, dated as of April 3, 1998, by and among IXC Communications, Inc., a Delaware corporation (the "Company"), each of the Guarantors listed on the signature pages hereto (the...Fourth Supplemental Indenture • May 12th, 1998 • Ixc Communications Inc • Telephone communications (no radiotelephone) • New York
