On June 12th, 2014, we will shut down the following Unicast name server IP addresses:
For most of our customers this will have no effect on you or your domains. If you are using the name servers ns1.dnsimple.com through ns4.dnsimple.com or the name servers ns1a.dnsimple.com through ns4a.dnsimple.com, then you can stop reading as you are not affected. If you are using vanity name servers and the domain name for the vanity name servers is registered with us, then you are not affected, as we have already updated your name server IP addresses.
You are only affected by this change if you use vanity name servers and the vanity name server names are in a domain that is registered with another domain registrar. In this case you must go to your domain registrar and ask them to change the IP addresses for those name server names as described in this support article: http://support.dnsimple.com/articles/dnsimple-nameservers/
If you have any questions about this change, please contact us: firstname.lastname@example.org. If you know you need to make this change but will be unable to in the given timeframe, please let us know as well.