Phone Number Validator – Validate International Numbers & Formats
Check E.164 formatting, detect countries/carriers, and flag invalid or disposable phone numbers for forms or CRM imports.
Phone Number Validator
Validate phone numbers with international format support and carrier detection
Enter phone number to validate
Or drag and drop a file
Validation result will appear here
lightbulbPopular Use Cases
Validate customer phone numbers during checkout to enable order notifications and delivery tracking
Verify phone numbers for SMS-based 2FA and account recovery systems
Validate and format phone numbers from customers across different countries and regions
Validate phone numbers before placing outbound calls to reduce failed connection attempts
scienceExample Phone Numbers
+1 (555) 123-4567
+44 20 7946 0958
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› About this tool · FAQ
Stop manually checking phone number formats! Validate phone numbers from 200+ countries with automatic country detection, E.164 format verification, and carrier analysis. Perfect for form validation, CRM data cleanup, and contact verification. Free, works offline, unlimited validations.
How do I validate a phone number?
Enter or paste the phone number in any format (international, national, E.164). The validator automatically detects the country, verifies format, and provides detailed information including carrier type and validity status.
Is this phone number validator free?
Yes, completely free with unlimited phone number validations. No signup required, no watermarks. Validate phone numbers from 200+ countries instantly in your browser.
Are phone numbers uploaded to servers?
No, all phone number validation happens locally in your browser. Your phone numbers and contact data never leave your computer for maximum privacy and security.
What phone number formats are supported?
Supports international (+1 555 123 4567), national (555 123 4567), E.164 (+15551234567), and various local formats with automatic detection.
How accurate is the country detection?
Country detection is based on ITU-T E.164 standards and supports 200+ countries with high accuracy for properly formatted international numbers.
Can it distinguish between mobile and landline?
Yes, for many countries the tool can identify mobile vs landline numbers based on number patterns, though accuracy varies by country.
Does it work with extensions?
Yes, the tool recognizes common extension formats like "ext 123", "extension 123", "x123", and "#123".
Is the validation real-time?
This tool validates phone number format and structure but does not check if the number is currently active or reachable.