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Illegal according to the RFC syntax for a DNS "label": http://tools.ietf.org/html/rfc1035#section-2.3.1



One aspect of host name syntax is hereby changed: the restriction on the first character is relaxed to allow either a letter or a digit. Host software MUST support this more liberal syntax.

-- http://tools.ietf.org/html/rfc1123#section-2


thank goodness, how else would 4chan have been allowed to exist on teh interwebz?




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