Path: utzoo!attcan!uunet!seismo!ukma!wuarchive!texbell!vector!telecom-gateway
From: rmadison@euler.berkeley.edu (Linc Madison)
Newsgroups: comp.dcom.telecom
Subject: Re: Allowing NXX Prefixes & Area Codes
Message-ID: <telecom-v09i0477m01@vector.dallas.tx.us>
Date: 27 Oct 89 21:49:25 GMT
Sender: news@vector.Dallas.TX.US
Organization: University of California, Berkeley
Lines: 15
Approved: telecom-request@vector.dallas.tx.us
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@vector.dallas.tx.us
X-TELECOM-Digest: volume 9, issue 477, message 1 of 10

In the list of area codes and NXX's posted here recently, the number
given for 312 was 769.  I'm rather shocked by this figure if it's
correct -- even if the figure of 769 includes reserved NXX's like 555,
950, etc., that leaves only 15 available.  That sort of brinksmanship
with the phone system is rather unusual.  Are you sure it wasn't 679
instead of 769?

[784 NXX's are possible = 8*10*10 - N11/N00; as I said, this doesn't
account for other "special case" reserved prefixes like 555, 950, 976,
and in some areas 970, 540, etc.  All the N11 and N00 are reserved.
Here in California, for example, we can dial 811-4094 from any
Pac*Bell phone in the state and talk to Pac*Bell billing for Berkeley
numbers, toll-free.]

  Linc Madison   =   rmadison@euler.berkeley.edu