Domains vs. area addressing

[jhh at ihldt.UUCP]

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