Our phone number format validation system is based on the most up-to-date international numbering plans containing complex syntax rules, carrier data, line type data and location information for all mobile and landline numbers in both national and international formats, for a total of 232 countries around the world. Only this way we are able to ensure the highest level of quality, reliability and accuracy for each validation result returned by the API.

Yes. Since we understand that your API requests contain may sensitive data, we offer paid customers the possibility to access the API and all data provided by and processed through it via industry-standard 256-bit HTTPS encryption. See the API's Documentation for details.

We do not process or store phone numbers for any purpose other than validation. See our Privacy Policy for details.

Pricing is based on the number of monthly API Requests offered for each individual Subscription Plan. Accessing any type of numverify API data using a valid API Access Key counts as one "API Request".

Users will be automatically notified via e-mail and on their Account Dashboard once at least 75%, 90%, and 100% of their monthly API Request allowance has been reached. After reaching 100% of the allowance, overages fees will apply so we make sure you won’t experience any disruptions and your website/application will keep running smoothly. You can learn more about overages billing here.

The numverify API's system status is being closely monitored around the clock. Since every effort is made to ensure the highest possible level of consistency, we are happy to announce that our API's uptime is at around 99.9%. At the current stage we are not offering any public statistics, but we will be happy to provide you with recent uptime reports - ask us »

The Free Plan is set out to be a "trial version" without a time limit, offering a volume of 100 monthly API requests.

Paid Subscription Plans feature significantly higher API request volumes, ensure secure data streams via 256-bit HTTPS Encryption, include unlimited and prioritised technical support, and offer a variety of must-have API functionalities.

In order to test the API and to get an idea of the product, you can simply sign up for the Free Plan.

As soon as you or your application requires more than 100 API requests per month and more professional API functionality, you would be well-advised to sign up for one of the paid Subscription Plans, starting at only USD 14.99 per month.

Payments can be made via Credit Card (Visa, MasterCard, Discover, Diner's Club). You can change your payment method at any given time in the Payment section of your Account Dashboard.

Yes. If you choose annual billing, the total price of your subscription plan will be up to 15% lower than the total amount you would pay with a monthly payment frequency.

You can initiate a cancellation or downgrade by selecting a new plan and providing at least one reason for your decision. The customer service team will cancel or downgrade your plan. Downgrades are not effective immediately; your premium subscription will remain active until the end of the current billing period.

You can initiate a cancellation or downgrade by selecting a new plan and providing at least one reason for your decision. The customer service team will cancel or downgrade your plan. Downgrades are not effective immediately; your premium subscription will remain active until the end of the current billing period.

To change your subscription from monthly to yearly billing, submit a request on the Contact Us page on the website following these steps:

Step 1: Sign in to your account

Step 2: Go to Contact Us page

Step 3: Fill out the form and choose the “Sales” category for this request.

Step 4: In the text box, include your specific request for example “Change from Monthly to Yearly subscription.”