Validate Phone Numbers from 200+ Countries Validate international phone numbers with country detection, formatting, and carrier type identification.
Phone Number Validator
Validate international phone numbers with country detection, formatting, and carrier type identification.
Enter a Phone Number
Type or paste a phone number into the input field.
Click Validate
Click Validate to check the number against international formatting rules.
Review Validation Results
Review the detected country, number type, validity status, and formatted output.
What Is Phone Number Validator?
A Phone Number Validator is a tool that checks if a given phone number is valid or not by parsing it and extracting relevant information such as country, type, and format. Developers and businesses use it to ensure the accuracy of collected phone numbers, solving the problem of invalid or incorrectly formatted numbers that can lead to failed communications. One specific issue it addresses is the complexity of international phone number validation, where different countries have unique formats and rules.
It stands out from other solutions due to its ability to handle phone numbers from over 200 countries, using the libphonenumber library to detect country and number type, such as mobile, fixed-line, or VoIP. The tool also provides various formatted outputs, including E.164, national, and international formats, making it a reliable international phone checker. When users input a phone number, it checks if the number is valid and returns detailed information about the number, including its country and type.
The tool's features, such as validating phone numbers and checking their possibility, make it useful for those who need to validate phone numbers on a large scale or integrate phone number validation into their applications. By using it to check if a phone number is valid, developers can ensure that their application or service can correctly handle and process phone numbers from around the world, making it easier to learn how to validate international phone numbers.
Why Use Phone Number Validator?
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Fast and accurate validation with detailed feedback
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Runs entirely in your browser — your data stays private
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No signup or installation required
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Mobile-friendly responsive interface
Common Use Cases
Verify Customer Phone Numbers
Sales teams use it to check phone numbers provided by customers, ensuring accurate contact information. For instance, a sales representative named Alex can verify the phone number of a new lead, John Doe, to confirm it's valid and make a successful call. This helps Alex connect with John quickly.
Check International Phone Number Format
When sending SMS notifications globally, developers need to validate international phone numbers. Rachel, a developer at a fintech company, uses the tool to check if a user's phone number from Japan is in the correct format. She then proceeds with sending a verification code via SMS.
Detect Invalid Phone Numbers
Call center managers rely on it to identify invalid phone numbers and update customer records accordingly. After running a list of numbers through the tool, manager Michael identifies several invalid numbers that were causing issues with automated dialing systems, allowing him to correct the data.
Extract E164 Phone Number Format
Telecom engineers extract E.164 formatted phone numbers for use in their network configurations. By using the tool, engineer David can take a list of phone numbers and convert them into the required format, ensuring seamless integration with existing systems.
Validate User Input Phone Numbers
Web developers implement it to validate user input on web forms, preventing incorrect data from entering their database. During registration, a user named Sophia enters her phone number, which is then validated in real-time, providing instant feedback if the format is incorrect.
Format National and International Phone Numbers
Marketing teams use it to standardize phone numbers for consistent branding across marketing materials. For an international campaign, marketer Emily formats a list of phone numbers from different countries into both national and international formats, ensuring clarity and professionalism in all advertisements.
Technical Guide
The tool works under the hood by utilizing the libphonenumber-js library to parse phone numbers from over 200 countries, detecting country and number type such as mobile, fixed-line, or VoIP. It uses the parsePhoneNumberFromString function from this library to extract relevant information about the input phone number. The React framework is used to build the user interface, with components like InputWithHelp and CopyButton being utilized to handle user input and provide a way to copy the E.164 formatted output. When a user inputs a phone number, it is passed through the validatePhone function which trims the input, checks if it's empty, and then attempts to parse it using libphonenumber-js.
If parsing is successful, the tool checks if the phone number is valid using the isValid method from libphonenumber-js, and extracts additional information such as country, international format, national format, E.164 format, and type. This information is stored in a PhoneResult object which contains a boolean indicating whether the phone number is valid and an array of strings providing details about the phone number. The tool also uses Framer Motion to add animations to the user interface, specifically when the validate button is clicked.
The input phone number is expected to be in a format that includes the country code prefix, such as +1 for the US or +44 for the UK. If the input phone number does not include a valid country code prefix, libphonenumber-js will fail to parse it and an error message will be displayed. The tool returns detailed information about the phone number, including its validity, country, type, and formatted outputs, making it useful for developers who need to validate phone numbers on a large scale or integrate phone number validation into their applications.
The PhoneResult object is used to store the result of the validation process, with properties like valid and details providing information about the input phone number. The details property contains an array of strings that provide additional information about the phone number, such as its country, international format, national format, E.164 format, and type. This information can be used by developers to handle and process phone numbers from around the world correctly.
In terms of data structures, the tool uses JavaScript objects and arrays to store and manipulate data. The PhoneResult object is an example of a JavaScript object that contains properties like valid and details, while the details property itself is an array of strings. The tool also uses React state to store the input phone number and the result of the validation process, with useState being used to create state variables for these values.
The tool's use of libphonenumber-js provides a reliable way to validate phone numbers from around the world, handling different formats and rules for each country. By using this library, developers can ensure that their application or service can correctly handle and process phone numbers, making it easier to integrate phone number validation into their applications. The tool's features, such as validating phone numbers and checking their possibility, make it useful for those who need to validate phone numbers on a large scale.
Tips & Best Practices
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1Check the detailed validation output for specific issues
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2All processing happens client-side for privacy
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3Bookmark this tool for quick access
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4Try various inputs to test edge cases
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🧰 MiscellaneousFrequently Asked Questions
Q Is the phone number validator free to use?
Q Is my phone number data safe when using this tool?
Q Can I validate phone numbers on my mobile device?
Q How accurate is phone number validation?
About This Tool
Phone Number Validator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.