Phone Number Validator
Validate phone numbers for 15+ countries including US, UK, India, Australia and more. Checks format, length, E.164 compatibility and country-specific patterns.
✅ 15+ Countries 📞 E.164 Format ⚡ Live 🔒 Private
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Phone Number Validator🌍
15+ Country Patterns
US, UK, India, Australia, Canada, Germany, France, Brazil, Japan and more.
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E.164 Formatting
Outputs the standardised international E.164 format (+[country][number]).
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5 Validation Checks
Digits, length, characters, international prefix and country pattern.
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Private
All validation runs in your browser using regex patterns. Nothing sent anywhere.
⭐ User Reviews
A
Alex T.
Yesterday
⭐⭐⭐⭐⭐
Exactly what I needed — fast, accurate and no sign-up required. Bookmarked for daily use.
Validator ToolsS
Sara K.
2 days ago
⭐⭐⭐⭐⭐
The detailed breakdown is excellent. Tells me not just pass/fail but exactly why. Very useful.
Validator ToolsD
Dan M.
1 week ago
⭐⭐⭐⭐⭐
Clean and reliable. I use this in my development workflow every day. Highly recommend.
Validator ToolsL
Laura B.
2 weeks ago
⭐⭐⭐⭐⭐
Saved me hours. The output is professional and ready to use without any editing needed.
Validator Tools📖 How to Use
1
Enter phone number
Type the number in any common format — local or international.
2
Select country
Choose the country for format-specific validation.
3
Read the checks
Each validation step explains what was checked and why.
4
Copy E.164 format
Use the formatted E.164 output for APIs and databases.
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❓ FAQ
What is E.164 phone number format?+
E.164 is the international standard format: a + sign, country code, and subscriber number — no spaces, dashes or brackets. Example: +14155552671 (US). Maximum 15 digits. Used by SMS APIs, VoIP systems and international databases.
How do I validate a phone number without an API?+
Client-side validation uses regex patterns based on each country's number structure. This covers format and length. For true validation (is this number assigned and active), carrier lookup APIs like Twilio Lookup or NumVerify are needed.
What is the maximum length of a phone number?+
ITU-T E.164 limits phone numbers to 15 digits (excluding the + prefix). This includes the country code. Some countries have variable-length national numbers, which is why length ranges are used in validation.
Why do US phone numbers have 10 digits?+
In the North American Numbering Plan (NANP), 10 digits = 3-digit area code + 3-digit exchange code + 4-digit subscriber number. With the +1 country code, the full E.164 format is 11 digits.
What is the difference between a landline and mobile number format?+
In most countries the format is the same — you cannot tell landline from mobile by number length alone. Some countries use distinct prefixes: UK mobile numbers start with 07, Indian mobile numbers start with 6-9. A carrier lookup API is needed for type detection.