link to phone number html link code example
Example 1: html make phone number callable
Area code with dashes, 1 and + sign
<a href="tel:+1-555-555-1212">555-555-1212</a>
Area code with no dashes, 1 and + sign
<a href="tel:+15555551212">555-555-1212</a>
Example 2: html telephone link
<a href="tel:1234657890">Call (123)456-7890</a>