Phone Number Formats Guide

Learn about international phone number formats and standards

E.164 Format Standard

The E.164 format is the international standard for phone numbers. It includes:

  • Country code (1-3 digits)
  • National destination code
  • Subscriber number
  • Maximum 15 digits total

Country-Specific Formats

North America (+1)

  • Format: +1 NXX-NXX-XXXX
  • Area code: 3 digits
  • Local number: 7 digits
  • Example: +1 555-123-4567

United Kingdom (+44)

  • Format: +44 XXXX XXXXXX
  • Area code: 2-5 digits
  • Local number: 6-8 digits
  • Example: +44 20 7123 4567

China (+86)

  • Format: +86 XXX XXXX XXXX
  • Mobile: 11 digits
  • Landline: varies by region
  • Example: +86 138 1234 5678

Japan (+81)

  • Format: +81 XX XXXX XXXX
  • Area code: 1-4 digits
  • Local number: 6-8 digits
  • Example: +81 3 1234 5678

Format Rules

General Rules

  • Always start with plus (+) sign
  • No spaces in E.164 format
  • Country code is mandatory
  • Remove leading zeros from area codes

Formatting Characters

  • Spaces for readability
  • Hyphens as separators
  • Parentheses for area codes
  • No other special characters

Format Tools

Format Validator

Check if your phone numbers follow the correct format.

Bulk Generator

Generate multiple formatted phone numbers at once.