The Routing NumberA routing number is nine digits and identifies the financial institution itself. The Account NumberYour account number identifies you specifically within that institution. Anyone comparing account vs. routing number on check placement will notice the routing number always sits farthest left along the bottom edge, followed by the account number, with the check number usually last. If the account number is wrong but the routing number is correct, the outcome is less predictable, and untangling it takes longer. Before you finish, confirm your new bank’s deposit insurance coverage through the FDIC or, for a credit union, the NCUA.