They mean a number in the decimal system.
Some of them can even be looked up in the ASCII chart, since they relate to a character, or a whole text.
Here you have one of the many decoding pages for binary to text on the web
The number in the honking: 666 - the number of the beast
Benders appartment number is a 36 in Decimal, or the $ sign
Just paste the code you want to know into there, and look if it is a encoded text.
Also go to the Re-/checked Weird Scenes Forums and search for "binary" over there, since all findings have been posted.