→External links: Remove "Public Suffix List" for it was added in /* See also
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{{refimprove|date=December 2010}}
A '''country code second-level ___domain''' ('''ccSLD''') is a [[second-level ___domain]] to a [[country code top-level ___domain]].{{citation needed|date=December 2010}} Such Aa ccSLD___domain may be reserved by thea [[___domain name registry]] for the registration of third-level domains, or assigned to a third party as a [[subdomain]].
Many country code ___domain registries implement ___domain name classes at the second level underneath their ccTLD, such as are present in the original generic [[top-level ___domain]]s <tt>{{mono|com</tt>}}, <tt>{{mono|net</tt>}}, and <tt>{{mono|org</tt>}}, which were intended for commercial entities, network operators, and non-profit organizations, respectively.
Many countries implement additional classes as well. For example, the [[United Kingdom]] ([[.uk|uk]]) uses <tt>{{mono|[[.co (second-level ___domain).uk|co.uk]]</tt>}} for commercial purposes and <tt>{{mono|[[.ac.uk|ac.uk]]}} for academic registrants. Brazil ([[.br]]) has a high number of predefined second-level ___domain)domains, 140 as of 2021; they range from {{mono|accom.ukbr}} for commercial activities and {{mono|vet.br}} for veterinarians to {{mono|wiki.br}} for wikis (see [[.br#Second-level_domains|.br § Second-level domains]]).</ttref>{{ forcite academicweb registrants| url=https://registro.br/dominio/categorias/ | title=Categorias de domínios .br | lang=pt-br | trans-title=Categories of .br domains | website=Registro.br | access-date=17 August 2021 }}</ref>
Brazil ([[.br|br]]) has a high number of restricted second-level domains, currently<ref>[http://registro.br/info/dpn.html Registro.br] 4 February 2011</ref> amounting to 67; they range from <tt>com.br</tt> for commercial activities, <tt>vet.br</tt> for veterinarians, to <tt>wiki.br</tt> for wikis.<ref>http://registro.br/info/dpn.html Brazil registry information</ref>
==See also==
* [[Domain Name System]]
* [[Private sub-___domain registry]]
*[[Independent Domain Registries]]
* [http://publicsuffix.org/ The [Public Suffix List]]▼
==References==
{{reflist}}
==External links==
▲* [http://publicsuffix.org/ The Public Suffix List]
