The answer is different for each network or provider. My ISP is Comcast in Portland, Oregon. My DNS hosts are different than my neighbor on Verizon, so there is no way for us to answer your question.
If you need your specific information you can obtain it through your ISP. If you just need DNS, Google has free public DNS at 8.8.8.8 and 8.8.4.4
More information is here: http://code.google.com/speed/public-dns/
HOSTS files were used
DNS - it handles both IpV4 and IPv6 addressing.
dns
DNS provides mapping of ip addresses to name. DNS is short from of Domain name system . DNS provides name to Ip address and that name is called as URL.
mapping name-to-IP addresses for internal hosts forwarding name resolution requests to a caching-only server
They are network services that are always on listening on the network for requests. Example: DNS, DHCP ..... DNS resolves Domain Names to IP addresses. DHCP assigns dynamic IP addresses.
Forward lookup zones
Resolution of names to ip addresses
There is service used to automatically associate names with addresses. DNS that is domain name system is the one that provides that mapping . DNS assigns name to the IP addresses .
DNS translates ip addresses into names which are easy read and remember for people.
Domain Name System (DNS).
Difference between DNS and DDNS: • DNS is static which means it remains fixed for a particular domain whereas Dynamic DNS changes is dynamic in nature which means it changes every time. • Both the systems comprise of the TCP/IP protocol. • Both DNS and DDNS are developed because users cannot remember the numeric IP addresses of different websites.