title: Is there an API somewhere that allow to compare one postal code with a list of postal code to find which one is nearest?
body: <p>We need your help. I have a problem that i need to solve and i haven't found any concrete solutions to this. In ASP.NET MVC we want to implement a specific feature.</p>
  
  <p>This is for a student training course application, we know that a student will do a training course outside and inside a specific town. The student will give out two or three postal code which are friends, familly etc. </p>
  
  <p><strong>What i need to do is to compare one postal code with a list of postal code to find which one is nearest.</strong></p>
  
  <p>The list of postal code are the emplacement where the student will do the training course.</p>
  
  <p>For this task, its obvious that i need an API or some WebService. Its also obvious that this task will require high trafic if we cannot pass a list of postal code rather than one postal code.</p>
  
  <p>We know that google might have something to do that but it only accept one postal code which isnt what we are looking for.</p>
  
  <p>So is there an API somewhere, a way or whatever that allow to compare one postal code with a list of postal code to find which one is nearest ? Any ideas ?</p>
  
  <p>Thanks.</p>
  
  <p>Edit #1: Please note that im looking for a way to pass a <strong>list of postal</strong> code to one postal code. The list may be very big and may need to compare with another list.</p>