home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sun-barr!ames!lll-winken!telecom-request
- From: rop@hacktic.nl (Rop Gonggrijp)
- Newsgroups: comp.dcom.telecom
- Subject: Re: ABCD as a Phreaking Tool
- Message-ID: <telecom12.643.6@eecs.nwu.edu>
- Date: 19 Aug 92 06:46:03 GMT
- Sender: Telecom@eecs.nwu.edu
- Organization: Hack-Tic Magazine
- Lines: 38
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 643, Message 6 of 13
-
- R. Schnell <mailrus!gatech!mit-eddie!media!ronnie.mit.edu@uunet.uu.net>
- writes:
-
- > I remember that phreaks used to use ABCD to hack directory assistance.
- > Without getting into the specifics, you could use certain combinations
- > during a call to DA, and you would be put in a trunk from which you
- > could actually answer information calls.
-
- Your message implies past tense. If this is not possible anymore, I
- would like to know more about what was going on.
-
- I'll tell you another nice thing one could do with ABCD up until about
- a month ago:
-
- If you called AT&T USA Direct from here (Holland) and got their
- computer, you gave it the number you wanted to call. After the bong
- you gave it a calling card. Any number in the format NPA-XXX-XXXX-ABCD
- worked, even if you used numbers in the 555-XXXX range. In other
- words, ABCD worked as a PIN on any card, even if the card did not
- exist.
-
- Needless to say we COULD have used this to give a lot of people very
- high phone bills, we did not. Within a few months after our
- discovering it, the hole disappeared as part of a routine upgrade. We
- believe AT&T never knew what 'hit' them. There is no guessing how many
- other people have discovered this, maybe years before we did.
-
- Guess this does show what 'capable minds' set up the technology that
- we are supposed to trust. Yet in the eyes of US law enforcement, we
- would have been the criminals for experimenting with this (using
- 555-XXXX numbers), and AT&T the poor victim.
-
-
- [Moderator's Note: That is correct. AT&T would be the victim and you
- would be the criminal. The reason we can trust the technology is
- because the minds which set it up are still infinitely more capable
- than 99 percent of the public. All things are relative. PAT]
-