Aerial photograph of Tuvalu

The first decision in choosing a domain name is selecting the most appropriate top-level domain to use. The TLD is the suffix at the end of your domain name, such as .com or .ca. The right TLD enhances your identity, and makes it easier for visitors to find your site and understand its purpose; choosing the wrong TLD can lead to confusion, uncertainty and suspicion.

For any site, there are usually several TLD options; it is possible to purchase multiple domain names and have them all direct to the same site, but it makes the most sense to publicize just one. We’ll discuss the basic TLD options first, then move on to recent additions.

Country TLDs

Every nation on Earth has its own two-letter TLD. Some are well-known and highly recognized: .ca for Canada, .ru for Russia and .uk for the United Kingdom. Some are under-utilized (for example, .us for the United States – historically, .com has been used instead). Some are less well-known, but are fun for geek trivia nights:

TLDCountryExample & Explanation

Vatican City, Il Papa’s home page


Canons of Helvetica, i.e. Switzerland The site for the Montana Hotel in Zurich


Tuvalu is a small, low-lying Pacific Island nation with a population of just over 10,000 people that is in long-term danger from global warming. At the height of the .com boom, the government of Tuvalu sold the rights of the .tv TLD for US $50 million.


Indian Ocean: specifically, the Chagos Archipelago, a chain of islands in that location.

Often used by web geeks as a play on words: IO also stands for “input-output”. The actual history of the Chagos Archipelago is tragic, the native inhabitants being forcefully removed from the islands by the United Kingdom in the 1950’s. The income from .io sales does not go to the Chagossian people: if buying one, you might want to change that.

Country TLDs are also supported in their native language and writing systems, using UTF-8 (IANA hosts a complete list of current authorized TLDs).

Buying a country TLD for your site has the advantage of making your geographical location clear, as well as showing a sense of patriotism. Many country TLD’s are available on the open market: you do not always have to be a citizen, or have a company registered in the country, in order to buy a domain name with a particular country TLD. However, the sale of that TLD is usually provided by a domain registrar within that country, making purchase of certain TLD’s, such as .ly (Libya), problematic.

Second-level (“provincial”) TLDs

Most countries that have a federal system of government, such as Canada, Australia and Russia, have historically issued provincial sub-domain TLDs to represent a site located in (or having information pertaining to) a province, territory or state: for example, for a site in Alberta, Canada. In the case of Canada, these are no longer issued.

Generic TLDs

A popular alternative to a country TLD is the so-called generic top level domain. Most of these are available on the open market. The original generic TLDs consist of:


Intended for use by commercial institutions. Used by US companies, as an alliterative to .us; as a result, all four-letter and lower combinations before .com are taken, as well as most dictionary words.


Intended for telecommunication and network providers.


Intended for non-profit, non-government organizations.


Post-secondary educational institutions.




Government institutions and services.

.com, .net and .org TLD’s are openly available; the others require some degree of institutional verification before purchase. In the last decade, the following generic TLDs have been added:


Intended for the air transport and aerospace industries; registrar and informational site


Companies, organizations and individuals in the Asia-Pacific region


For businesses; an alternative to .com


Cooperative organizations; primary registrar


Company; another alternative to .com


Informational sites.


Sites related to jobs and employment


Intended for mobile sub sites; becoming less relevant with the increasing use of CSS3 media queries


For museums: primary registrar is


Intended for individuals and families


For the travel industry


Adult entertainment

With the exception of and .biz, these can be a little difficult to find and purchase; providers can be limited.

Once you have decided on the appropriate TLD for your site, you need to decide on a domain name, check if it is available, and purchase it. I’ve previously written some general rules for choosing domain names and suggested several domain registrars that you may wish to use.