Phone verification

Make sure the numbers you are collecting are active and connected

Collect accurate, verified phone numbers in any online form.

Start verifying phone numbers

Addressfinder’s phone verification service enhances your communication by verifying phone numbers collected in your forms, checkouts, or account signups in real-time. With real-time phone verification, ensure seamless communication and cut down on missed connections or misinformation.

Start free trial

Fix data quality at the source

In-form phone number verification doesn’t just check if the format is correct. Phone verification also makes sure the number is actively connected, so your customer service teams don’t end up stuck without options.

phone number checker showing phone verification and phone metadata

Installation

This is the simplest way to add phone verification to your website. It only takes a few minutes.

Copy the code snippet below and update the phoneSelector and licenceKey with your values, then add it within the <body> tags in your webpage page - ideally just before the closing </body> tag.

<script>
(function (d) {
  var conf = { phoneSelector: "#phone_number", licenceKey: "YOUR_ADDRESSFINDER_KEY", defaultCountryCode: "NZ", rules: {}, };
  d.addEventListener("DOMContentLoaded", function () {if (d.querySelector(conf.phoneSelector)) {var e=d.createElement("script");e.src="https://api.addressfinder.io/assets/phone/v2/widget.js",e.async =!0,e.onload=function(){new AddressfinderPhone.Phone.Widget(conf.phoneSelector,conf.licenceKey,conf)},d.body.appendChild(e)}});
})(document);
</script>

Once the snippet is added, phone verification will automatically start working with your form fields. You can further customise the verification service by adding rules.

Read the full step-by-step guide and get a more technical overview of how everything works in the docs.

How does it work?

The phone verification service performs 3 checks when a phone number is sent to be validated.

Range check

Check to determine if the phone number lays within the ranges assigned to telephone network providers within the specific country. This check is also used to identify the line type.

Rules check

Cross references learnings from the range checks with rules you have set. For example, only mobile numbers permitted.

Connection check

Verifies if the phone number is connected to the network. The method varies depending on the line type and country but may include silent network check or flash-call.

Start free trial Read the docs