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"Thilo" == Thilo Salmon <salmon@sipgate.de> writes:

Thilo> I read that as "yes, it is a mapping", but "no, it is not Thilo> (necessarily) an assignment". With few exceptions E.164 Thilo> numbers have already been assigned and the e164.arpa domain Thilo> merely functions as a directory. First of all Thilo, DNS is NOT a directory. Please don't confuse it with one. Secondly, an entry under e164.arpa *is* an assignment. The only way to get a number entered in the public tree is if (a) the country code has been delegated; (b) the registry for that country code delegates the number concerned. If that doesn't constitute an assignment, I don't know what does. Of course, whether that E.164 number has been assigned by the regulator or a telco is another matter.