There are a lot of formats when it comes to phone numbers, but philippines whatsapp number luckily, there are free tools you can use to make sure a mobile number is valid. This post will show you two ways to verify that a phone number is valid: the Twilio Lookup API, and the intl-tel-input JavaScript plugin . This post builds on another one, How to Code an International Phone Number Input Field , which you can refer to for more details on how to build the nice number input field I use below. You can find the full code on my GitHub .
Why You Should Validate Phone Number Entries You want to validate phone numbers to prevent spam signups, fraud, and also to prevent basic mistakes like typos. We'll include some phone verification recommendations and other account security best practices at the end, because you'll also want to make sure that the user has access to the phone number provided - not just that the number is valid. Set up phone number verification You may already have a number input field, but if you're starting from scratch, you can use a basic HTML page that accepts phone number input.