Bad phone numbers are quieter than bad emails. An invalid email bounces and tells you. An invalid number just rings out, or silently eats an SMS credit, and the only sign is that your contact rate drifts down and your text messages start getting filtered. The free Phone Validator checks any number in about a second and tells you whether it is real, where it is and whether it can receive a text. Here is how to use it and what to do with each answer.
Step 1: Enter the number with its country code
Type the number with the international dialling code in front: +1 for the US and Canada, +44 for the UK, +61 for Australia, and so on. The validator supports numbers from more than 240 countries and territories, but it needs the code to know which numbering plan to check against. Add your name and email and run it.
Step 2: Read the six fields in the result
Validity verdict
Is this a number that can exist on the network? The validator checks the number against the live numbering plan for its country, which catches wrong lengths, unassigned prefixes and made-up numbers like 555-0100.
Country and country code
Where the number is registered. Useful on its own when you are cleaning an international list and want to route each country to the right team or the right time zone.
International (E.164) format
The same number written the way dialers, CRMs and SMS gateways expect it: +, country code, number, no spaces or punctuation. Copy this into your system rather than the version the lead typed.
Local format
How the number is written in its own country, for anything a person is going to read.
Geographic location
The region associated with the number prefix. For mobiles this is where the number was issued rather than where the phone is now, but it is still the best available hint about the lead’s area for a local offer.
Line type
Mobile, landline, VoIP or toll-free. This is the field that decides what you do next.
Step 3: Route by line type
A mobile can take an SMS, so it goes into your text follow-up. A landline cannot, so sending to it wastes a credit and, if you do it at scale, teaches the carriers that your traffic is sloppy. A VoIP number is often a business line or a disposable number; treat it with the same caution as a catch-all email. Toll-free numbers belong to businesses and should get the business script.
Step 4: Validate at the point of capture
The best time to check is while the lead is still on your form, so a typo can be fixed in the moment. The second best time is before a list goes into your dialer or your SMS campaign. If you are importing leads from a Google Maps scrape or any purchased list, run the numbers first and drop the invalid rows.
Why this matters more for SMS than for calls
Carriers filter SMS traffic based on sender behaviour. A high rate of sends to invalid or landline numbers is one of the signals that gets a sending number flagged, after which your legitimate messages to real customers start disappearing too. Validating before you send protects the deliverability of everything else.
What to do with the valid numbers
A validated mobile number is the highest-value contact field you have. It is the one channel where response rates are still measured in minutes. If your team cannot follow up on every number within five minutes, the New Lead AI Setter ROI Calculator shows what an AI setter that texts and calls every lead instantly would be worth, and the speed-to-lead AI page explains how it works.
Bulk and API
The free tool validates one number at a time. For lists in the thousands or validation inside an automated workflow, contact us for bulk pricing and API access.
Validate a number now. No signup, instant result.
