Yesterday morning the Internet juggernaut that is Google announced that its public DNS service has far surpassed their expectations for the experimental service. In fact, the company has taken the ‘beta service’ training wheels off of what they believe to be "the largest public DNS service in the world," and their statement that they are now handling 70 billion requests a day means the claim may not be far from the truth.
Interestingly, 70% of the service’s users come from outside of the US, and Google has announced that they are beefing up their overseas presence to service them with new access points in Australia, India, Japan, and Nigeria. Further, they are expanding their offerings in Asia in addition to maintaining the current servers in North America, South America, and Europe.
The company is continuing to provide their DNS service for free, and they ended their announcementby stating "Google Public DNS’s goal is simple: making the web—really, the whole Internet!—faster for our users."
For those curious, DNS is the technology that allows users to punch in easy to remember text URLs and have their computers connect to the proper servers via numerical IP addresses (which are definitely not as easy to remember). It has been likened to the Internet equivalent of a phone book, and that description is an apt one as DNS servers maintain a running list of IP addresses and the accompanying URL (universal resource locator) so that humans can input a text URL and connect to servers using an IP address. DNSSEC makes things a bit more complicated as it adds further layers of security, but on a basic level the description fits.
DNS benchmark "namebench" results
There are several free offerings besides the DNS services provided by your ISP, and open source tools like Name Bench can help you track down which DNS service is the fastest for you. Users connect to DNS servers using an IP address on one of several levels (in software, at the computer level, or at the router level, et al), and for the majority of people your modem and/or router will obtain the default DNS automatically from your ISP along with your IP.
The default DNS is not your only option, however. Further, many routers can support up to three DNS IP addresses, and by connecting to multiple (separate) services you can achieve a bit of redundancy and maybe even a bit of speed. A fast DNS server can result in much faster web page load times, especially for sites that you don’t normally go to (and thus are not cached).
In the case of the Google Public DNS, they operate on the following IP addresses.
(The latter two are IPv6 addresses, and were announced on World IPv6 Day.)
If you have not looked into alternative DNS services, I encourage you to do so as they can often be faster and more reliable than the default ISP provided servers (though that is not always the case). It does not take much time to test and is an easy configuration tweak that can save you a bit of time in getting to each web page (like PC Perspective!). Have you tried out Google or other alternative DNS services, and did you see any improvements?