Look at the bottom left corner of your checks. The first nine-digit number on the left is the bank routing number. Immediately to the right of that is your checking account number.
dig meaning, definition, what is dig: to break up and move soil using a tool, a machine, or your hands: . Learn more.
to break up, turn over, or remove earth, sand, etc., as with a shovel, spade, bulldozer, or claw; make an excavation. to make one's way or work by or as by removing or turning over material: to dig through the files.