Bank Routing Number

GN Bank Routing Number

The primary ABA routing number (RTN) for GN Bank, Chicago, IL is shown below.

Primary ABA / RTN

271070924

Verify before you send money. This is the bank's primary registered routing number, taken from the FFIEC National Information Center institution record (last refreshed here on October 8, 2026). Banks often use a different routing number for wire transfers than for ACH, and large banks vary it by region; always confirm the correct number on a check or with your bank before initiating a transfer.

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 GN Bank routing number?

The GN Bank routing number is 271070924. It is the primary ABA routing transit number registered to GN Bank, headquartered in Chicago, IL. 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 GN Bank wire routing number?

This page lists 271070924, the primary routing number registered to GN 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 GN Bank before sending a wire.

Is ABA number 271070924 the routing number for GN Bank?

Yes. ABA number 271070924 is the primary routing number registered to GN 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 271070924?

Routing number 271070924 belongs to GN Bank, headquartered in Chicago, IL. It is the bank's primary ABA routing number (FDIC certificate 29399).

Routing numbers in Chicago, IL

Bank: BMO Bank N.A.: 071000288
Bank: The Northern Trust Company: 071000152
Bank: CIBC Bank USA: 071006486
Credit union: Alliant Credit Union: 271081528
Bank: Byline Bank: 071001533
Bank: Wintrust Bank, N.A.: 071925444
Bank: Lakeside Bank: 071001504
Bank: Beverly Bank & Trust Company, N.A.: 071026356

All routing numbers in Illinois

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Regulator records: FDIC BankFind (cert 29399) · FFIEC NIC profile (RSSD 250476)