How To Tell Where My Laptop Was Purchased??

i have a dell inspiron 1525 it is still under warranty & i need to fix a couple of things on it. I bought it second hand and the only way that they will fix it is if i tell them the store location it was originally purchased from. is there any way to get this information from one of those #’s on the bottom, or somewhere to search where i can find this info???? please help!!!!