CFR›Title 47›Chapter I›Part 64›Subpart W ContainsSection 64.2201CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart W—Ring Signaling Integrity Sections 64.2201 § 64.2201 Ringing indication requirements. Source78 FR 76241, Dec. 17, 2013, unless otherwise noted. Previous V Subpart V—Rural Call Completion Next X Subpart X—Subscriber List Information