CFR›Title 47›Chapter I›Part 9›Subpart D ContainsSections 9.11–9.12CorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 Subpart D—Interconnected Voice over Internet Protocol Services Sections 9.11 § 9.11 E911 Service. 9.12 § 9.12 Access to 911 and E911 service capabilities. Previous C Subpart C—Commercial Mobile Radio Service Next E Subpart E—Telecommunications Relay Services for Persons with Disabilities