What are the distribution area codes for Usenet news postings?
Originally from
ftp://garbo.uwasa.fi/pc/link/tsfaqn.zip
Questions from Usenet and Timo's answers
If you look at the header of a Usenet news posting, you'll observe
that it includes the a line "Distribution:" where you might put a
limited area code like usa, na (North America), local etc. Don't
trust this. The distribution limitation is not guaranteed to work.
In global newsgroups a local distribution can easily "leak" since
not all configurations along the feed observe this feature. Thus the
distribution field in the header is best left unchanged. The best
advice is always assume that the newsgroups default will take
precedence. In practice that means a "world" distribution in news
hierarchies like news.* and comp.*. The New users' newsgroup news.newusers.questions
is a good case in point. Always assume world distribution. Hence the
frequent question where to find the different distribution codes is
somewhat moot.
Consequently, when you write to the international Usenet
newsgroups, don't make comments which might make you appear as
xenophobic or ignorant like "this is the United States, right"
believing that no one outside will see your posting.
Kent Landfield wrote on this in is own FAQ (reprinted with
permission): In theory the distributions work as intended, but in
practice, due to lack of verification by posting agents,
misconfigured news transport agents, wide-area sites which pick up
all news regardless of distribution, and inadequate controls on the
names of the distributions, they are relatively useless.

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