Country code second-level domain
A country code second-level domain (ccSLD) is a second-level domain to a country code top-level domain. It may be set apart by the domain name registry for the registration of third-level domains or registered to a third party as a subdomain.
Many registries reuse common top-level domain names at the second-level such as "com", "net" and "org", e.g. .com.sg.