Phone Number Formatter: Convert to International Standards
Our phone number formatter converts phone numbers to standardized international formats including E.164, international, national, and RFC 3966 (tel: URI). Simply enter any phone number and get it formatted for databases, APIs, or HTML links.
Phone number formatting is essential for applications that store or dial phone numbers internationally. Using standardized formats ensures compatibility across systems and prevents duplicate entries.
Format Types Explained
E.164 Format: The international standard (+12133734253). Always starts with "+" followed by country code and national number. Maximum 15 digits. Best for databases and APIs.
International Format: Human-readable with spaces (+1 213 373 4253). Good for display to users.
National Format: Local format with area code ((213) 373-4253). Familiar to local users.
RFC 3966 (tel: URI): URL format for HTML links (tel:+12133734253). Used in <a href="tel:..."> tags.
Why Use E.164?
E.164 is the gold standard for phone number storage. It's unambiguous, internationally recognized, and supported by all major telecommunications systems. When you store numbers in E.164 format, you can always format them back to any other format, but the reverse isn't always true.
Phone Number Validation
Our formatter validates phone numbers in two ways:
Possible: Checks if the number has a valid length for the country.
Valid: Checks if the number matches known patterns for that country's numbering plan.
FAQ
What is a country calling code?
The country calling code is the 1-3 digit prefix that identifies a country (e.g., +1 for USA/Canada, +44 for UK, +91 for India). It's required when dialing internationally.
Why might a number be "possible" but not "valid"?
A number is "possible" if it has the right length, but "valid" means the digits match known patterns. A made-up number with correct length would be possible but invalid.