Remenisent of any spy novel you may have read, this number was placed in a brief classified ad on craigslist.org. The ad looked like this: For mein fraulein
Mein Fraulein, I haven’t heard from you in a while. Won’t you
call me? 212 //// 796 //// 0735
When you called the number the caller was given this code:
Group 415
01305 60510 12079 04606 50100
93000 08203 90130 94069 01207
81080 17028 01706 90220 73038
01401 70150 15073 00402 00680
12013 12510 00540 04091 01401
30150 86022 09608 10660 02082
05507 00020 00000 02208 30290
08022 01200 40710 13065 02709
40190 29014 02200 80020 11083
07300 30260 19000 00700 00000
86
Now who knows if this is really a spy, a marketing campaign for Da Vinci Code, or a recruitment exercise/mind game being played by the NSA. Check out this story about it, they have a lot more info, and the comments are great.
Two digit number, for example, 73, 83, 20, etc, being spaced by a zero, unless the number is less than 10 and then it would be represented by, for example, 04, 08, etc. there are two spots of mess where this pattern was discontinued, most likely a common mistake when a lot of number was involved. I also check the frequency of the 2 digit numbers, a total of 44, suggesting two sets of number that represent the same letter. Why 44? if you take away Q,V,X,Z, from the 26 letters, the remaining is 22, and 22 x 2 = 44. The frequency of certain number in the clain also suggest that the A, E, I, O, U are in its place regularly, and so are letters such as S, T, W, Y, etc.
I also want to add that there could be more than 44 sets of numbers, but I excluded those 2 sets that could be a mistake to begin with. Perhaps as soon as someone decode the whole thing, we could then easily fill that in.