Domain DNS Lookup this online webtool, above at the top of this website, will return the DNS records for a Domain.   This can be useful to verify DNS changes that you have made on your DNS server, registrar, etc.

I use this tool commonly when I make an MX record or A record change to a customer’s DNS server and want to see if the changes have “replicated”.

Actually the DNS records do not really replicate, it just appears that they do. What happens is on a DNS server, the records have a timeout setting. This tells another DNS server how long to keep the DNS lookup in cache.

So, if you make a change to your DNS settings, all of the other DNS servers have to wait for this timeout to occur before they query your DNS server for the DNS record again.

This entry was posted on Thursday, December 6th, 2007 at 9:32 am and is filed under Webmaster.You can follow any responses to this entry through the RSS 2.0 feed.You can leave a response, or trackback from your own site.