Add Telephone Number Links With HTML5

To make telephone number clickable and to call the number from the link you use the tel: attribute with the number you want to dial.

<a href='tel:123456789'>Call 123456789</a>

Skype: callto

To make the link open skype to make the call then you need to change the tel attribute to callto:.

<a href='callto:123456789'>Call 123456789</a>