Semantic markup is becoming more and more important – hopefully it's a tool that is in your SEO toolbox. If not, you can get started today with some simple additions that will allow you to do things like show a business phone number in search results.
Right now, while your number might be shown if relevant to the result, or included in the top of your page, you can add some simple markup to your site that will show search engines what your number is why it should be displayed.
Note – right now, this is for a national or global based contact number. How can you do this locally? Get a map pack listing!