title: Regex for excluding 855 numbers with or without +1s
body: <p>I have the following set of strings:</p>
  
  <pre><code>tel:+1 855 345 3455
  tel:+185564354
  tel:+85523456
  tel:1855345445
  tel:6047222733
  tel:+54434553
  tel:+1833453335
  </code></pre>
  
  <p>I am trying to write a regex that will omit any string value that contains an 855 number that may or may not be preceded by a 1, +, space or a combination of all three.</p>
  
  <p>I tried a few but none seem to give me a 100% accurate match.</p>
  
  <p>The one that seems to work for most strings is: <code>**^tel:[+]?[1]?[ ]?[^8][^5][^5].*$**</code> but it also matches these two string values:</p>
  
  <pre><code>tel:+1 855 345 3455
  tel:+185564354
  </code></pre>
  
  <p>And I am not sure why.</p>
  
  <p>Can any regex whiz help?</p>