NSB Bank Routing Number

What is an ABA routing number?

An ABA routing number, also called a routing transit number (RTN), is a 9-digit code that identifies a U.S. financial institution in the payment system. It tells ACH transfers, Fedwire payments, and paper checks which bank to route money to. The format was created by the American Bankers Association in 1910 and is still the backbone of U.S. domestic payments.

What is the difference between a routing number and an account number?

Your routing number identifies the bank; your account number identifies your specific account at that bank. On a paper check, the routing number is the 9-digit number in the bottom-left, and the account number is to its right.

What is the NSB Bank routing number?

The NSB Bank routing number is 073921530. It is the primary ABA routing transit number registered to NSB Bank, headquartered in Mason City, IA. A bank can hold more than one routing number, so this is the one on record for the institution, not necessarily the one printed on every check. The number comes from the FFIEC National Information Center institution record, last refreshed here on October 8, 2026.

What is the NSB Bank wire routing number?

This page lists 073921530, the primary routing number registered to NSB Bank. The record does not say whether the bank uses the same number for wire transfers, and many banks use a separate routing number for domestic wires. Confirm the wire routing number with NSB Bank before sending a wire.

Is ABA number 073921530 the routing number for NSB Bank?

Yes. ABA number 073921530 is the primary routing number registered to NSB Bank. Check it against the routing number on a check or in your online banking before sending an ACH payment, because a bank can use different numbers by region or product.

Which bank uses routing number 073921530?

Routing number 073921530 belongs to NSB Bank, headquartered in Mason City, IA. It is the bank's primary ABA routing number (FDIC certificate 8094).

Routing numbers in Mason City, IA

Bank

First Citizens Bank: 073901602

Credit union

Cent Credit Union: 273975548

Credit union

North Iowa Community Credit Union: 273975564

Credit union

Iowa Heartland Credit Union: 273975412

Credit union

A C E Credit Union: 273975399

Credit union

Gas and Electric Employees Credit Union: 273975467

All routing numbers in Iowa