What is the E.164 phone number format?▼
E.164 is the international standard for phone numbers. Format: +[country code][number], max 15 digits total. Example: +14155552671. It is used by SMS APIs, VoIP systems, and databases.
How do I format a phone number for the US?▼
US format: (XXX) XXX-XXXX. Example: (415) 555-2671. With country code: +1 (415) 555-2671.
How do I format a phone number for the UK?▼
UK format: 0XXXX XXXXXXX. Example: 020 7946 0958. International: +44 20 7946 0958. London numbers start with 020, mobile with 07.
Can this tool detect the country from a phone number?▼
Yes! Enter a phone number with country code and the tool will detect the country based on the international dialing code.
What is a valid phone number?▼
A valid phone number has the correct number of digits for its country code and follows the country's numbering plan. Different countries have different lengths and formats.
Why are there different phone number formats?▼
Different countries have different numbering conventions for readability. Local formats use area codes familiar to residents, while international formats include country codes for global use.
Does this work with all countries?▼
The tool supports major countries including US, UK, Canada, Australia, China, Japan, Germany, France, India, and many more. It covers the most common international dialing codes.
Can I validate multiple phone numbers?▼
Yes! Enter one number per line in batch mode. Each number will be formatted and validated individually with results shown in a table.