Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ihldt.UUCP Path: utzoo!linus!philabs!mcvax!cbosgd!mhuxl!ihnp4!ihldt!jhh From: jhh@ihldt.UUCP Newsgroups: net.mail,net.unix-wizards Subject: Re: Domains vs. area addressing Message-ID: <2223@ihldt.UUCP> Date: Tue, 31-Jan-84 11:45:20 EST Article-I.D.: ihldt.2223 Posted: Tue Jan 31 11:45:20 1984 Date-Received: Thu, 2-Feb-84 00:51:45 EST References: <563@seismo.UUCP> Organization: AT&T Bell Labs, Naperville, IL Lines: 19 Apparently-To: philabs!mcvax!rnews It is questionable whether telephonic codes are appropriate for data networking. CCITT, in Recommendation X.121, has specified Data Country Codes (DCC) for each nation. For example, the United States has DCC of 310, the Netherlands has 204, the U.K. has 234, and Canada has 302. The number is further broken up as a 4 digit Data Network Identifier Code for nations with more than 1 data network. In the case of numbers referenced relative to the public telephone network, the number is 9 + Telephone Country Code + National Telephone Number. I suspect that DCCs will be more important than POTS numbers in the not-too-distant future. Something that locks us into a numbering plan that will superceeded should be avoided. John Haller AT&T Bell Laboratories