Validate phone

Check an international phone number’s E.164 digit count and country-code shape.

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ToolPhone Validator
Input
Output
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Preview

How it works

Spaces, hyphens, and parentheses are removed, the remaining value must begin with a non-zero digit, and the total count must be seven to fifteen digits. The check validates shape only and does not identify an assigned subscriber.

  • The fifteen-digit ceiling follows E.164.
  • Human separators are accepted before the international pattern is checked.

Worked example

Valid Phone (E.164)
Validate an international phone number in E.164 format
Input
											+1-555-123-4567
Output
												Valid phone number: +1-555-123-4567 (11 digits)

When to use this

SMS providers, contact databases, and two-factor enrollment forms validate phone strings.

Edge cases

  • A national number without a country prefix can have enough digits but still fail.
  • More than fifteen digits is invalid even with plausible separators.
  • A valid-looking number may be unassigned because no carrier lookup occurs.

References