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Definition: country code


An Internet top-level domain assigned to a country. A country code is a two-letter suffix such as .us (United States), .ca (Canada) and .de (Germany). For a list of codes, see country codes A-E, country codes F-M and country codes N-Z. For a list of all top-level domains, see Internet domain name. The Pacific island nation of Tuvalu found a unique way to profit from its country code (see .tv).

Computers read Internet addresses from right to left. Thus, on encountering sven@univ.oslo.net.se, the message would first be sent to Sweden, since .se is the country code for Sweden. Swedish routers would then send the message to univ.oslo.net where it will be waiting for Sven the next time he signs on.