What is E.164 format?

E.164 is the international standard that writes a number as a plus sign, country code, and subscriber number with no spaces — for example +12133734253. It is the format most APIs and databases expect.

Why do I need to pick a default country?

A number typed in national form, like (213) 373-4253, is ambiguous without a country. The default country tells the parser how to interpret it; numbers already in +country form are detected automatically.

What is E.164 and why does it matter?

E.164 is the international phone number standard: a plus sign, country code, and number with no spaces, like +442079460958. Storing numbers in E.164 makes them unambiguous and is what SMS and telephony APIs expect.

Why does the default country matter?

A number written in national form, such as 020 7946 0958, is meaningless without knowing the country. The default country tells the parser how to interpret it. Numbers already in +country form are recognised regardless of the default.

What does "valid but not a valid number" mean?

The parser can sometimes recognise the shape of a number yet determine it does not match any real numbering plan for that region — for example too few digits. That means the input parsed but is not a usable number.

Can it tell mobile from landline?

Often, yes. libphonenumber infers the line type from the number range where the data allows, reporting values like mobile, fixed line, or toll-free. For some regions the type is reported as unknown.

Phone Number Parser — Validate & Format Numbers

How to use Phone Number Parser

A phone number parser takes a number written in almost any style and tells you everything about it: whether it is valid, which country it belongs to, its line type, and how to write it in every standard format. This tool is built on libphonenumber, the same Google library that powers phone validation on Android and countless apps. Type a number in national form with a default country, or paste one already in international +country form, and get the E.164, international, national, and RFC 3966 URI formats side by side. Everything runs in your browser, so numbers are never uploaded.

Type or paste a phone number.
Pick the default country for national-format numbers.
Click Parse Number.
Read the validity, formats, country, and line type.
Copy whichever format you need.

Your data never leaves your device — 100% private processing.

Why phone parsing is harder than it looks

Phone numbers seem simple but are full of edge cases: different countries have different lengths, trunk prefixes like the leading 0 that are dropped internationally, area codes that vary in size, and special ranges for mobile, toll-free, and premium services. Writing your own validation with regular expressions quickly becomes a losing battle against this complexity. libphonenumber solves it by encoding Google's carefully maintained metadata for every country's numbering plan, so it knows that a given range is a valid mobile number in one country and meaningless in another. This tool puts that intelligence one paste away, which is invaluable whenever you accept phone numbers from users.

Storing and displaying numbers correctly

A good rule for any application is to store phone numbers in E.164 and format them for display only when showing them to a user. E.164 is canonical and unambiguous, so it deduplicates cleanly, works with every telephony API, and never depends on knowing a default region later. When you present a number to a user, the national format is friendliest for people in the same country, while the international format is clearest across borders. This parser gives you all of these at once from a single input, so you can capture the E.164 value for your database and the formatted versions for your interface without writing any formatting code yourself.

Worked examples

US national input

Inputs: (213) 373-4253 · US

Result: +12133734253 · valid · mobile/fixed line

UK international

Inputs: +44 20 7946 0958

Result: Country GB · national 020 7946 0958

Glossary

E.164: The international standard format: + country code and number, no spaces.
Calling code: The country dialing prefix, such as +1 or +44.
National format: How a number is written for dialing within its own country.
Line type: The category of a number, such as mobile, fixed line, or toll-free.

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Phone Number Parser

How to use Phone Number Parser

Why phone parsing is harder than it looks

Storing and displaying numbers correctly

Worked examples

Glossary

Related reading

Frequently Asked Questions

Why use Phone Number Parser?

Common use cases

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