Phone Number Validator
Validate phone numbers offline with Google libphonenumber metadata: E.164, international and national formats, mobile or fixed line type, country and dial code. Batch mode with CSV export — everything runs locally in your browser.
What does it mean for a phone number to be valid?
The tool checks the number against the numbering rules of its country: correct length, correct prefix ranges and correct area codes, using the same metadata Google’s libphonenumber library uses for Android. A valid number is one that could plausibly be assigned — it does not guarantee the line is currently active or in service.
What is E.164?
E.164 is the international standard for phone number format: a plus sign, the country calling code (1 to 3 digits) and the subscriber number, with no spaces, dashes or parentheses — for example +8613800138000 or +442071838750. It is the format required by most APIs, SMS gateways and CRM imports, which is why the tool shows it first.
What is the difference between international and national format?
The international format keeps the country code and spaces, like +44 20 7183 8750, while the national format is how the number is dialed inside its own country, like 020 7183 8750 with the trunk prefix 0 and no country code. Use E.164 for storage and APIs, national format for display to local users.
How do I enter a number without the + prefix?
Type the number exactly as it is dialed locally (e.g. 13800138000 or 020 7183 8750) and pick the default country from the selector. The tool then interprets the number using that country’s rules. If you enter a number starting with +, the country selector is ignored because the prefix already identifies the country.
What does the line type tell me?
The metadata classifies ranges as mobile, fixed line, fixed or mobile, VoIP, toll-free, premium rate, shared cost, pager, Voicemail, UAN and personal numbers. This tells you whether you are looking at a mobile subscriber or a landline, which matters for SMS reachability and for fraud screening. Some countries have poorly classified ranges, in which case the result is Other/unknown.
How does batch mode work?
Switch to the Batch tab, paste one number per line (any format: with or without +, with spaces and dashes) and choose a default country for lines that lack a + prefix. Press Validate list: every line is parsed, the table shows input, validity, E.164, type and country, a summary counts the valid ones, and Export CSV downloads everything for spreadsheets.
Does the tool check whether the number is currently active?
No. Validation is purely offline numbering-plan logic. Whether a line is live, disconnected or ported to another carrier can only be determined by a live HLR/network query, which this tool does not perform — there are no network requests at all.
Where is my data sent?
Nowhere. Validation runs entirely in your browser using bundled libphonenumber metadata; no number, list or CSV ever leaves your device, which makes it safe for customer data and contact lists.
Why is a number marked invalid even though it looks right?
Most often it is a formatting issue: a number typed without + and with the wrong default country, a missing trunk prefix (like the leading 0), or a real but recently reassigned range that your copy of the numbering plan treats differently. Double-check the country selector first — that fixes the majority of false negatives.
How accurate is the type detection?
Type detection is only as good as the public numbering-plan data behind it. Mobile and fixed ranges are reliable in most of Europe, North America and East Asia; in some markets, ranges are shared or poorly documented, so a mobile-looking number can turn out to be fixed. Treat the type as a strong hint, not a guarantee.
How to Use Phone Number Validator
This phone number validator parses numbers with the same metadata Google libphonenumber uses (the "max" metadata set, bundled into the page). Enter a number — with or without the + prefix — pick a default country for prefix-less input, and the tool shows validity, E.164, international and national formats, the line type (mobile, fixed, VoIP, toll-free...) and the country with its dial code. The Batch tab validates a whole list at once and exports the results as CSV. Everything runs offline in your browser.
- Type a number in the Single tab. If it starts with +, the country is detected automatically; otherwise pick the default country from the selector (CN +86 is preset).
- The badge shows whether the number is valid under the country numbering plan, and the cards below show E.164 (+8613800138000), international (+86 138 0013 8000) and national (138 0013 8000) formats.
- Read the Line type card: Mobile numbers can receive SMS; fixed line, VoIP and toll-free have different rules — useful for CRM imports and fraud checks.
- For lists, open the Batch tab, paste one number per line, choose the default country for lines without +, then press Validate list.
- Check the summary ({v} of {n} valid), review the table, and press Export CSV to download input, validity, E.164, type and country for every line.
A "valid" number satisfies the numbering plan, but tells you nothing about whether the line is currently in service — checking that requires a live HLR lookup, which this offline tool deliberately does not do. If a correct-looking number fails, re-check the default country first.
Related Tools
- IBAN Validator Validate International Bank Account Numbers (IBAN) instantly. Check format, length, country code, and checksum for 80+ countries with real-time results.
- Credit Card Validator Batch validate multiple credit card numbers at once. Identify card type, check Luhn algorithm, and verify format for Visa, Mastercard, Amex and 20+ card types.
- Email Validator Validate email addresses instantly. Check syntax, format, domain and RFC 5322 compliance. Support batch validation for multiple addresses.
- File Hash Checker Calculate and verify MD5, SHA-1, SHA-256, SHA-512 file hashes locally
- Chmod Calculator Free online chmod calculator to visualize and calculate Linux file permissions with checkboxes. Instantly convert between numeric (755, 644) and symbolic notation (rwxr-xr-x). Supports special permissions like setuid, setgid, sticky bit.
- ASCII Table Complete ASCII character encoding reference with decimal, hexadecimal, octal, binary codes, HTML entities, and character descriptions. Search and filter instantly.
- Hex Viewer View file contents in hex dump format with search, offset navigation, and virtual scrolling
- MIME Type Lookup Instantly find MIME types by file extension or look up extensions by MIME type. Free online reference with 1000+ entries.