Phone Number Validation

Validate customer phone numbers to ensure reachability and to distinguish mobile from landlines

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Ensure that your customers are reachable

Real numbers only
  • By asking your customer to provide a phone number — and then validating the legitimacy of that number — you can minimize fraud while ensuring that you have a way to contact that customer in the future.
The right channel
  • Validating information enables you to distinguish mobile from landline numbers — ensuring that you don’t try to send text messages to landlines if reaching out via SMS.
Clean database
  • By periodically validating the numbers in your customer database, you can be sure that customer numbers are still reachable, reducing delivery errors when running SMS or voice-based marketing campaigns.
Optimize communication costs
  • Discover which carrier network a customer is using to optimize SMS routing when engaging your customer.
How it works
Identify a phone number to validate
Your app can ask users to enter a phone number during registration or you can identify existing numbers in your customer database.
Query Nexmo Number Insight
Your application passes the phone number to Nexmo’s Number Insight API for analysis.
Gather insight
Nexmo Number Insight queries multiple information sources to validate and gather information about the number.
Act on validated information
Nexmo Number Insight returns information on the phone number to your application so you can remove unreachable numbers and identify valid numbers as mobile or landline.


Programmable elements used in this solution


Step-by-step guide to sanitize and validate phone numbers

Quality, Support, Scalability