<p>Contact the author of this page:</p>

<address>
  <a href="mailto:jim@rock.com">jim@rock.com</a><br>
  <a href="tel:+13115552368">(311) 555-2368</a>
</address>

a[href^='mailto']::before {
    content: '📧 ';
}

a[href^='tel']::before {
    content: '📞 ';
}