TUCoPS :: Dialup BBSes :: calctabs.txt Misc: How To CALCULATE valid TABS NUMBERS
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FRee BBS ACCouNTS
THe TaBS WaY
MaKe MoNeY, WiN FRieNDS, MaKe MoNeY
BY GaRBaGe PiLe
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This file will get you free accounts for the new 1-900 system being
offered by over 700 BBS's (according to BoardWatch Mag)  throughout
the USA.

The TABS system is a 1-900 billing service that BBS's subscribe  to
that allows you to call a 900 number and get access to the  bbs  or
files or whatever the bbs happens to be giving out  for  the  call.
Each call costs \$10.00 but shortly  there  will  be \$25.00  options
too.

When you call the 900 number, you type in the BBS's phone number as
the "PIN" and a 7 digit number is parcelled out to you for your  10
bucks.  This 7 digit number is somehow computed  from  the  board's
PIN.  From my experimentation, you can derive the next number valid
number from any existing valid number.

For example, if you know that the number 1234567 was valid at  some
point in time, then you can apply this formula to it to derive  the
next valid number for that board.  If that number is already  used,
then you would derive the next number from that number and continue
until you get a number that get's your account.

The only problem with my technique is that you  require  one  valid
number to act as the seed.  This is because each board  starts  out
at some point which I have not been able to discern, but I think it
is based upon the board's phone number.  Hopefully  by  January  or
February I will have that nailed.

The steps

1. Known Valid Number:   1234567

2. First, raise by 1/12    1234567 ^ (1/12) = 3.218297753

3. The next number is the first 7 fractional digits :  2182977

To Get Next Valid Number, Repeat Steps 1-3

1. Known Valid Number:   2182977

2. First, raise by 1/12    2182977 ^ (1/12) = 3.374847062

3. The next number is the first 7 fractional digits :  3748470

To Get Next Valid Number, Repeat Steps 1-3

1. Known Valid Number:   3748470

2. First, raise by 1/12    3748470 ^ (1/12) = 3.53037769

3. The next number is the first 7 fractional digits : 5303776

You get the point.

The only problem with my technique is that you  require  one  valid
I have used this technique to get 23  accounts (worth  \$230.00)  in
the 3 weeks I have since I have figured out the iterative  formula.
I figure by Jan. 94 I should probably have enough  to  give  to  my
friend! The trouble now is finding the  boards  that  subscribe  to
tabs.

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