There are probably several numbers that you can text to get info and answers to simple questions, but the most popular must be
http://wiki.answers.com/What_number_do_you_text_to_get_info_from_google
466453 (Google)
Text HELP to 466453 to learn how to use it.
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to text a block number you of to have a computer
That this number has been disconnected, that the text did not get to the number, or you won't get anything back.
The number +900080002050 in your text messages is from Turkey whose Country calling code is +90.
7777
you text back to the number saying quit or stop and then they legally have to stop.