| Interoperability Standards Advisory (ISA)

Data used to categorize individuals for identification, records matching, and other purposes.

Data Element	Additional Information
Phone Number Description Numbers and symbols to contact an individual when using a phone.	Applicable Vocabulary Standard(s) Applicable Standards Both standards are required ITU-T E.123, Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors, International operation - General provisions concerning users: Notation for national and international telephone numbers, email addresses and web addresses, February 2001 ITU-T E.164, Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors, International operation - Numbering plan of the international telephone service, The international public telecommunication numbering plan, November 2010 Adopted at 45 CFR 170.207(q)(1)

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