DOMAIN HACK

Before explaining the concept of domain hack let me explain you what is domain. Domain is name of the website or symbolic representation of the website. Getting unique domain name is very difficult because of the large number of websites already present in the web world.Now let me explain you how a website is named. A domain name consist of the name you want to assign,TLD(TOP LEVEL DOMAIN), SLD(SECONDARY LEVEL DOMAIN), third level domain(actually then secondary level domain and third level domain are together called SLD ie SECONDARY LEVEL DOMAIN)and further it can contain any number of domain level. Eg: http://www.indianrail.gov.in/ here ".in" is the TOP LEVEL DOMAIN and ".gov" is the SECONDARY LEVEL DOMAIN and "indianrail" is the name of website.

TOP LEVEL DOMAIN: It is the domain name assigned to a country. Internet Assigned Numbers Authority assign TLD to each country, it is generally a two or more word domain based on the Territory's area code. Eg: ".in" for "India", ".us" for "United States of America", ".hk" for "Hong Kong", ".iq" for "Iraq", ".np" for "Nepal" and many more. Eg: http://www.indianrail.gov.in/ here ".in" is the TOP LEVEL DOMAIN. Several Top Level Domain has been changed by Internet Assigned Numbers Authority. Eg: ".cs" was for several years the Top Level Domain (TLD) for Czechoslovakia.since the country got split into two parts Czech Republic and Slovakia in 1993, and the two new countries were soon assigned their own TLDs: ".cz" and ".sk" respectively.


SECONDARY LEVEL DOMAIN: These domain names are written just before or towards left of top level domain and after or towards right of third level domain. Eg: http://www.indianrail.gov.in/ here ".gov" is the SECONDARY LEVEL DOMAIN. Further there are third level domain, Fourth level domain and so on. There is no limit of level of domain one can choose but only upto SLD are common till date. Now let me explain "DOMAIN HACK".

DOMAIN HACK is the way of obtaining the write domain name of your choice using different SLD(Secondary Level Domain) and TLD(Top Level Domain).Domain hacks are created by adding a sub domain (SLD) to a top level domain (TLD) in order to create a word or name of some sort.
Eg: the popular social bookmark site, Del.icio.us is created using a sub domain del,icio as the SLD and the .us as TLD, ie del + icio + us.
You can easily hack any domain using a famous domain name generator website xona. This website also provide data of domain name having ending with various top level domain and domain names of various length.