[comp.dcom.telecom] Area Codes and Reachability

pc@bellcore.bellcore.com (10/02/89)

Noticed a few anomalies in that wonderful publication, the Telephone
Area Code Directory, TR-EOP-000093 from Bellcore, the latest edition
that I have being the July, 1988 one.

For instance, every point in Alaska except one is in the 907 area code
(as one might expect).  Hyder, AK is *only* reachable via 604 (BC).
Why should this be?  Probably, if I found that place on a map, it
would be adjacent to the BC border, and presumably, close to a
Canadian switch of some description.  However, why can't the routing
tables reflect this reality and allow us to use 907?  Coudn't there be
a "logical foreign exchange" within a host area code?  Or would that
be too much work for such a small community?

This is also true of:
Zones 6-8 in Wheeling, VW (Ohio area code).
Some miles on the Alaska highway, BC (AB area code).
Quite a few places in SK (AB area code).


Further strangeness:

For Nevada and Yukon Terr, every point is listed out explicitly with the
area code, rather than the summary "All Points, area code...".
Implication being that there were points in NV that had a UT/CA/AZ/OR
area code, but are now genuine 702 area code, but that Bellcore has
forgotten to update the directory appropriately?

Peter Clitherow

[Moderator's Note: I think the reasoning for listing out all dialable
cities in Nevada and Yukon Territory is that if anything, those two
areas are less likely to be dialable than most other states or
provinces. For example, in Nevada, there are still a large number of
toll stations -- places which cannot be dialed and must be called
through the operator.  Now, there are a few places like this in almost
every state or province, but in general we can dial direct wherever we
want. In Nevada and Yukon, in general we *cannot* dial a large number
of small localities. I think in editing the Area Code Directory, for
lack of space to list every single last point, the rule of thumb was
if almost everywhere is dialable, and there is one area code only,
then note 'all points, area such and such'. If quite a few places are
not dialable, then list a selection of those that are, even if it is
only one area.  PT]