The Chase routing number associated with a checking account can be found printed on the lower-left edge of a blank check. The routing number is made up of nine digits with a special three-dot symbol immediately preceding and following the number.
Do not mistake the routing number for the checking account number. The checking account number is printed to the right of the routing number on the lower-middle edge of the check. The checking account number does not include the special three-dot symbol.
Chase Bank has 25 different routing numbers, each of which is assigned to a specific region of the country. If there isn't a blank check on hand, look up routing numbers by region at chase.com.