Path: utzoo!attcan!uunet!lll-winken!ames!killer!vector!nobody
From: Miguel_Cruz@ub.cc.umich.edu
Newsgroups: comp.dcom.telecom
Subject: Re: Find Your Ringback Number
Message-ID: <telecom-v09i0013m06@vector.UUCP>
Date: 12 Jan 89 05:40:38 GMT
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X-TELECOM-Digest: volume 9, issue 13, message 6

Re: moderator's response to my system to find one's ringback number

Point well taken.  I would never recommend or advocate running something like
that after nightfall, and even in the daytime, attempt it on your own
conscience.

A better solution might be to secure a list of all exchanges in your area
code; about 10 valid exchange prefixes are always left out of an area code's
numbering plan for plant test functions such as ringback.  A trip to the
public library's phone book section would give one the information necessary
for cross-referencing prefixes.

Miguel Cruz