title: Phone number carrier API
body: <p>Is there any public database containing current mobile carriers for phone numbers? </p>
  
  <p>I find out that there are many paid services (like numverify.com) and static (not real time updated) database from Google (libphonenumber).</p>
  
  <p>I am looking for free API or database like libphonenumber, but with actual data about mobile phone carrier (in countries where numbers can be moved from one carrier to another).</p>
  
  <p>Thank you</p>