SEO - How to Show Phone Numbers in Google Search

Question

when I search for a keyword in Google, the listing for my site has 2 phone number in the result.

I want to know why Google shows these numbers? (These numbers are not in my main text.) How can I add phone numbers in Google results? (What quality should they have?)

Answer 1

<div itemscope itemtype="http://schema.org/LocalBusiness">
        <span itemprop="telephone"><a href="tel:01234555666">Link Text Here</a></span>
    </div>

take this code as a reference and use this to structure your data 

and if you want to add your phone number there are other metrices to consider like phone number that bring better advantage of your site