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

<address>
  <a href="mailto:jim@example.com">jim@example.com</a><br />
  <a href="tel:+14155550132">+1 (415) 555‑0132</a>
</address>

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

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