title: Why does updating a domain's nameservers take so long?
body: <p>When I change my domain's (a dot com) nameservers it can take up to 2 days.<br />
  I know that that's usual, but WHY is that?<br /><br /></p>
  
  <p>Just curious because my webhosting went down and I have to wait now because I changed nameservers, why?</p>
  
  <p>EDIT:<br />
  Did some little research and my webhosting says it can MAXIMUM take up to 24 hours.<br />
  Ok, I knew it was around 24 - 48 hours, but it is apperently only 24 hours.<br />
  Anyways, I found this article: <a href="http://www.tech-faq.com/how-to-flush-dns.html">http://www.tech-faq.com/how-to-flush-dns.html</a><br />
  And it says that you can flush DNS with ipconfig blabla, also already knew that.<br />
  But what is remarkable is that this is standing at the second paragraph:<br /></p>
  
  <blockquote>The MaxCacheTtl represents the maximum time that a DNS lookup%u2019s results will be cached for. The default value is 86,400 seconds. If this value is set to 1, DNS entries will only be cached for a single second.</blockquote>
  
  <p>Now take your calculator and type in: 86,400 / 60 / 60 = TADAH!! 24 (hours)<br />
  I haven't tried it yet because the registery key wasn't present in my registery :S</p>