Authenticate Number Field For Free

Use the IPQS free phone validation tool to verify phone numbers with 99.9% accuracy to check if a phone number is real and active. Lookup any phone number with international phone validation that enables worldwide coverage.

HTML Demo: <input type="tel"> <label for="phone">Enter your phone number:</label> <input type="tel" id="phone" name="phone" pattern="[0-9]{3}-[0-9]{3}-[0-9]{4}" required /> <small>Format: 123-456-7890</small>

The simplest HTML validation feature is the required attribute. To make an input mandatory, add this attribute to the element. When this attribute is set, the element matches the :required UI pseudo-class and the form won't submit, displaying an error message on submission when the input is empty.

Approach: We have used isNaN() function for validation of the text field for numeric value only. Text-field data is passed in the function and if passed data is a number then isNan() returns true and if data is not a number or a combination of both number and alphabets then it returns false.

Validation of a number If the number is assigned by a telecom authority and has a carrier and line type. The type of line assigned to the number (mobile, VoIP, toll-free, landline, etc.) To which region the number belongs to. The name of the carrier. The format of the phone number (in standard and local accepted format)

HTML Demo: <input type="tel"> <label for="phone">Enter your phone number:</label> <input type="tel" id="phone" name="phone" pattern="[0-9]{3}-[0-9]{3}-[0-9]{4}" required /> <small>Format: 123-456-7890</small>

Phone number validation using a simple Regular expression 0-9]{3}[-\s\.]?[ 0-9]{4,6}$/im; return re. test(input_str); } function validateForm(event) { var phone = document. getElementById('myform_phone').