The routing number for Suffolk County N/B is 21405464.

Suffolk County N/B is located at this address: P O Box 9000, Riverhead, New York.

In case of mail delivery, this is the full address you should use:

Suffolk County N/B
P O Box 9000
Riverhead
New York
11901-0000

To contact Suffolk County N/B by phone, call: (631) 208-2450

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Please Note:

This page has the contact information and routing numbers for Suffolk County N/B.

You'll find information like phone number, full address, zip code, routing numbers and more.

We are working hard to keep the site updated, however, we cannot guarantee that the information on the site is fully updated at any point in time as changes may occur at any time we encourage you to validate the information with your bank.

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Suffolk County N/B Check example * Sometimes the routing number is written after the account number and not before.

Routing Numbers General Information

Routing number is a 9 digit number given to a bank by the ABA (American Bankers Association) in order to recognize the bank for which payment is being sent to.

Routing numbers are often called ABA numbers, Check routing numbers, or Routing transit numbers (RTN).

Routing numbers change from bank to bank and from one bank location to another, there are also different routing numbers for different transactions.

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