.us is the Internet country code top-level domain (ccTLD) for the United States. It was established in early 1985. Registrants of .us domains must be U.S. citizens, residents, or organizations, or a foreign entity with a presence in the United States. Most registrants in the U.S. have registered for .com, .net, .org and other gTLDs, instead of .us, which has primarily been used by state and local governments, even though private entities may also register .us domains.
.ar is the Internet country code top-level domain (ccTLD) for Argentina. It is administered by NIC Argentina. Registering an .ar domain directly is now allowed. Previously, only 9 of the second-level domains listed below were open for registration, and a local presence in Argentina was required. Recently the extension has become synonymous with Augmented Reality and is being by many prominent AR and XR startups.
.bo is the Internet country code top-level domain (ccTLD) for Bolivia. BO is the ISO 3166-1 code for Bolivia.
.es is the country code top-level domain (ccTLD) for Spain. It is administered by the Network Information Centre of Spain.
.co is the Internet country code top-level domain (ccTLD) assigned to Colombia.
.do is the country code top-level domain (ccTLD) for the Dominican Republic. The Network Information Center .do has administered the domain since 1991.
.ec is the country code top-level domain (ccTLD) for Ecuador.
.uy (uruguay) 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.
.mx is the Internet country code top-level domain (ccTLD) for Mexico, which in 2009 was re-opened to new registrations by NIC México. In 2009, the .mx ccTLD was rolled out in three steps:
.gr is the country code top-level domain (ccTLD) for Greece. Registrations are processed via accredited registrars and domain names in Greek characters may also be registered.
.gt is the Internet country code top-level domain (ccTLD) for Guatemala. As from 29 May 2012, .gt second level registrations are available.
.kg is the Internet country code top-level domain (ccTLD) for Kyrgyzstan. Although registrations are normally at the second level, there are some specialized third-level registrations such as those under gov.kg and mil.kg.
.ky is the Internet country code top-level domain (ccTLD) for the Cayman Islands. The code was chosen as other possible options had already been allocated. Registration was limited to residents and registered companies in the Cayman Islands with a local address, but this restriction was removed in September 2015. The Cayman Islands also has the international three-letter code CYM and has won a bid to be awarded the .cym domain in a future expansion of the top-level domain space.
.mg is the Internet country code top-level domain (ccTLD) for the Republic of Madagascar.
.ng is the Internet country code top-level domain (ccTLD) for Nigeria. It is overseen by the Nigeria Internet Registration Association (NIRA).
.ni is the Internet country code top-level domain (ccTLD) for Nicaragua.
.pe is the Internet country code top-level domain (ccTLD) for Peru.
.ps is the Internet country code top-level domain ccTLD officially assigned to the State of Palestine. It is administered by the Palestinian National Internet Naming Authority.
.tj is the Internet country code top-level domain (ccTLD) for Tajikistan. Registrations are processed via accredited registrars.
.tt is the internet country code top-level domain (ccTLD) in the Domain Name System of the Internet for Trinidad and Tobago.
Venezuela 
