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

Data Element
Phone Number

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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