Free Phone Number Validation

With our phone number validation service you can easily verify if any national or international phone number is really valid. We also detect the exact line type (landline vs. mobile) to ensure full compliance with the FCC Telephone Consumer Protection Act (TCPA).

If you want to verify lots of phone numbers from your CRM or database in one go or if you need an online, real-time phone number validation for the registration forms on your website, we have exactly the right solution for you:

Avoid disconnects and increase the performance of your marketing campaigns - clean your database from invalid or outdated phone numbers and focus on real people!

Validate Phone Number

Enter the phone number you want to validate (you can register for a free API key here).
Select the country for this phone number:
Your API key (register for a free API Key):

Register for a free API key or upload a file to validate a list of phone numbers!

International Phone Number Validation

Our phone number validation service is available for any national or international phone number. We provide you with detailed information for each phone number:

  • Line type: FIXED_LINE, MOBILE, VOIP etc.
  • Geolocation: Region and city
  • Phone number correction and re-formatting according to national and international standards

During the entire process, the phone number is not contacted in any way, nor will any phones connected to a line ring.

Phone Number Validation Online API

The best way to capture good leads is of course to validate contact information right at the point of entry. That is why many businesses have decided to integrate our online phone number validation API directly into their sign-up forms. This allows website visitors to correct errors in their phone numbers instantly with the benefit that only valid phone numbers are accepted and businesses can keep in touch with existing and prospective customers.
If you want to use real-time phone number validation on your website or in your app, our online phone number validation API is the right solution for you.

The online phone number verification API can be easily integrated in websites and applications. Code examples are available in several programming languages.

Batch Phone Number List Verification

Phone number list validation cleans CRM systems and customer databases from outdated or invalid phone numbers and helps business clients to save money and focus on real customers only.
Phone number lists can be validated using our phone number list validation service.

Phone Validation Plus Contact Data Validation

With our Phone Validation Plus service, you can add contact data details like name, address, company and others and we'll validate this information together with the phone numbers you provide.
See how it works with a free trial for up to 100 contacts!

Data Protection and Privacy

Byteplant is located in Germany and operates according to German and European data protection and privacy legislation which is one of the strictest in the world.

We are committed to protect your data and your privacy. Any data submitted to our validation service is processed and stored for no purpose other than validation. All data from API requests and batch/list processing will be automatically deleted within 14 days after the data has been processed.

Please see our Data Protection and Privacy Policy for details.