Hi friends. I am 252116211. You may think I am 252116211 or 252116211. But I am not. Also, I am not 252116211, 252116211, 252116211.... or some other 252116211. There is a lot that's not what I am. I am lazy enough to list them all. But one thing I can guarantee you, I am definitely 252116211. If you know the old bda, who expanded his three member family to ten by inviting seven new members, with his help, you can find me.

Tell me who I am and how did you find me (it will be appreciated if you can explain everything mentioned in the question).

  • 2
    $\begingroup$ Bomb Damage Assessment? British Dental Association? $\endgroup$
    – A E
    Commented Dec 12, 2014 at 13:34
  • $\begingroup$ @AE looking at numbers, big data analysis, broadcast data network sound more relevant $\endgroup$
    – Mohit Jain
    Commented Dec 13, 2014 at 5:19

2 Answers 2


Probably not right but...

112911252, which is 252116211 rotated 180 degrees when typed in a calculator.

bda's family is

abdenmpquw, which are letters that look like other letters when rotated 180 degrees.


I would put this in a comment to the question, but that doesn't have spoiler tags. So my lead would be that it has to do..

...with the Broadcast Driver Architecture

, but I haven't figured out who you are yet. I believe this because

IPs are about numbers


"the old" may refer to the 'outdated' technology as mentioned in the linked article.

However. I do not know how to go further from here. Maybe some other geek can?

  • $\begingroup$ I tried using your second spoilered section to parse the 10 digit number above into a useful sequence. Starting with 25 got me the UK's Ministry of Defense, and starting with 2 got me an Israeli cell service. There are only 5 valid sequences in this series though, since 252 doesn't work (I think.) $\endgroup$ Commented Dec 12, 2014 at 15:45
  • 1
    $\begingroup$ British Defence Agency? Not really anything in Google bout it. It's probably top secret. Ooh a red dot... $\endgroup$
    – dmg
    Commented Dec 12, 2014 at 17:11

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