Wells Fargo lists their routing transit numbers as a way to identify which of the company's banks to send money to or withdraw money from. Wells Fargo notes that routing numbers differ by state, except in Southern California where customers may have a different routing number than the state number.
Wells Fargo routing numbers contain nine digits and are located on the bottom left of a check or deposit slip. The company notes that the routing number indicates where a client opened an account. Wells Fargo points out that the company has different routing numbers for different types of accounts, such as checking, savings, prepaid cards, lines of credit and wire transfers. Customers must use the appropriate routing number for the desired type of transaction.