.uk is the Internet country code top-level domain (ccTLD) for the United Kingdom. It was first registered in July 1985, seven months after the original generic top-level domains such as .com and the first country code after .us.
.gb is a reserved Internet country code top-level domain (ccTLD) for the United Kingdom, derived from Great Britain.
A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
.ag is the Internet country code top-level domain (ccTLD) for Antigua and Barbuda.
.bb is the Internet country code top-level domain (ccTLD) for Barbados.
.za is the Internet country code top-level domain (ccTLD) for South Africa. The .za namespace is managed and regulated by the .za Domain Name Authority (ZADNA). Most domains are registered under the second-level domain .co.za.
.fj is the country code top-level domain (ccTLD) for Fiji. Domain names can not be registered directly under .fj, but must be registered as a third level name. The .fj TLD was registered in 1992 and is currently administered by The University of the South Pacific IT Services.
.ve is the Internet country code top-level domain (ccTLD) for Venezuela.
.uy is the Internet country code top-level domain (ccTLD) for Uruguay. Domain names can be registered at second-level or at third-level. As of 11 June 2012, second level .uy registrations are possible.
The Internet country code top-level domain (ccTLD) .io is nominally assigned to the British Indian Ocean Territory. The domain is operated commercially by Afilias, a domain name registry subsidiary of Ethos Capital.
.ir is the Internet country code top-level domain (ccTLD) for Iran. It is managed by the Institute for Research in Fundamental Sciences.
.mo is the Internet country code top-level domain (ccTLD) for Macau, China.
.gu is the Internet country code top-level domain (ccTLD) for Guam.
.lk is the Internet country code top-level domain (ccTLD) for Sri Lanka. Foreign companies who do not have a local presence can only reserve their top-level and corresponding open second-level domains. In order to register and use a name they must have a contact address in Sri Lanka.
.mw is the Internet country code top-level domain (ccTLD) for Malawi. After initial delegation, in 2002 the IANA recommended that administration of the ccTLD be transferred to the Malawi Sustainable Development Network Programme from Computer Solutions Ltd. The recommendation was implemented.
.na is the Internet country code top-level domain (ccTLD) for Namibia corresponding to the two letter code from the ISO-3166 standard.
.sl is the Internet country code top-level domain (ccTLD) for Sierra Leone.
.cat is a sponsored top-level domain intended to be used to highlight the Catalan language. Its policy has been developed by ICANN and Fundació puntCAT. It was approved in September 2005.
A domain hack is a domain name that suggests a word, phrase, or name when concatenating two or more adjacent levels of that domain. For example, "bir.ds" and "examp.le", using the fictitious country-code domains .ds and .le, suggest the words birds and example respectively. In this context, the word hack denotes a clever trick, not an exploit or break-in.
The Domain Name System of the Internet consists of a set of top-level domains that constitute the root domain of the hierarchical name space and database. In the growth of the Internet, it became desirable to expand the initial set of six generic top-level domains in 1984. As a result, new top-level domain names have been proposed for implementation by ICANN. Such proposals included a variety of models ranging from adoption of policies for unrestricted gTLDs that could be registered by anyone for any purpose, to chartered gTLDs for specialized uses by specialized organizations. In October 2000, ICANN published a list of proposals for top-level domain strings it had received.
Gibraltar 
