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E.164 format · International numbers · Bulk normalization

E.164 Phone Number Format Validator

Learn the E.164 phone number format, validate international numbers, and normalize bulk phone lists for APIs, CRM imports, SMS, and WhatsApp workflows.

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Format preview
UK local: 07700 900123
E.164:    +447700900123

E.164 uses a plus sign, country code, and national significant number without spaces or punctuation.

Examples

E.164 examples by country

Use examples for testing format, not as real customer numbers.

InputCountryOutput
415 555 2671US+14155552671
07700 900123UK+447700900123
030 123456Germany+4930123456

Use cases for E.164 normalization

Use E.164 normalization before bulk phone validation, API submissions, CRM imports, SMS sending, WhatsApp filtering, and global phone list cleaning.

When format is not enough

A correctly formatted number can still be invalid, unreachable, fixed line, VoIP, or wrong for your campaign. Pair format checks with Validate International Phone Numbers, line type detection, Phone Validation API, and UK Phone Number Checker for deeper validation.

Security and limits

Formatting validates shape, not ownership. Do not use format checks as identity proof. Review Security and Privacy Policy for data handling.

FAQ

What is E.164 format?

E.164 is an international phone number format with a plus sign, country code, and national number, such as +14155552671.

Can I normalize a whole CSV?

Yes. Use Phone List Cleaning to normalize and validate phone numbers in bulk.

What Is a Valid Phone Number Format?

What Is a Valid Phone Number Format? is answered here for users comparing What Is a Valid Phone Number Format? before using E.164 Phone Number Format. Use lawful lists, check the mapped product page, and keep uncertain records in review.

Phone validation cluster

Related phone validation pages

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Phone Validation GuidePillar guide for phone number verification, validation methods, and list hygiene.Phone List CleaningClean phone lists before SMS, WhatsApp, CRM import, and campaign workflows.Data ScrubberScrub CSV contact files before validation, enrichment, CRM import, or outreach.UK Phone Number CheckerValidate UK mobile, landline, and VoIP numbers for campaign-ready lists.Validate International Phone NumbersValidate mixed-country phone lists with E.164, carrier, and line type signals.Lead EnrichmentAdd phone, carrier, line type, and messaging signals to bulk lead files.Lead ScreeningFilter invalid, risky, duplicate, and wrong-channel leads before outreach.Bulk Phone Number ValidatorValidate thousands of numbers from CSV files and export clean segments.Bulk Phone ValidatorValidate phone lists in bulk before CRM, SMS, and outreach workflows.Phone Validation APIRun batch validation jobs via API for CRM and pipelines.Free Phone ValidatorRun a quick single-number check before scaling to batch validation.Best Phone ValidatorsCompare validation tools, use cases, and buyer-fit tradeoffs.
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