## What is an ABA Routing Number?

An ABA (American Bankers Association) routing number, also known as a bank routing number that identifies the particular financial institution or banks branch in the U.S. ABA routing no is a nine digits numarical number developed by American Bankers Association in 1910.

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## What is an ABA Routing Number

An ABA (American Bankers Association) routing number, also known as a bank routing number that identifies the perticular financial institution or banks branch in the U.S. ABA routing no is a nine digits numarical number developed by American Bankers Association in 1910. An ABA Routing Number will only be issued to a federal or state chartered financial institution which is eligible to maintain an account at a Federal Reserve Bank.

#### Decoading an ABA Routing Number

• The first four digit of the ABA/Routing Number is assigned by the Federal Reserve Routing System and represent the bank's physical location.

• Next two digit is designate which Federal Reserve bank the institution's electronic and wire transfers will route through.

• Next digit mean seventh digit indicates which Federal Reserve cheque processing center was initially assigned to the bank.

• Next digit mean eighth digit of the Routing number designates which Federal Reserve district the bank is in.

• Lastly the nineth digit provides a checksum. The checksum is a complicated mathematical expression using the first eight digits. If the end result does not equal the checksum number, the transaction gets flagged and rerouted for manual processing.

#### Example: Breakdown of ABA Routing Number Number

 1 2 3 4 5 6 7 8 9 Federal Reserve Symbol Federal Reserve Bank the Institution's Electronic and Wire Transfers Will Route Through Cheque Processing Center Identifier Bank District Identifier Cheque Digit

#### What ABA Routing Number Used For?

An ABA Routing Number used for various financial transation and wires and electronic automatic clearing house (ACH) transactions such as electronic funds transfer, direct deposit, direct payment of consumer bills, e-checks, and tax payments, among others.

#### How to Find ABA Routing Numbers?

You can get your accountâ€™s ABA number from several sources. If you have a checkbook handy, the easiest solution is to locate the numbers at the bottom of one of your checks & also you can login into your online banking portal to check the ABA routing number & lastly contact to your bank helpline number or visit bank physical location & ask for the routing number.

#### FEDERAL RESERVE DISTRICT

List of Federal Reserve District Codes for all Banks in US

Primary (01-12) Thrift (+20) Electronic (+60) Federal Reserve Bank
1 21 61 Boston
2 22 62 New York
4 24 64 Cleveland
5 25 65 Richmond
6 26 66 Atlanta
7 27 67 Chicago
8 28 68 St. Louis
9 29 69 Minneapolis
10 30 70 Kansas City
11 31 71 Dallas
12 32 72 San Francisco

00 is used by the United States Government & 80 is used for traveler's checks.

#### Chequesum Calculation Method

The cheque digit is the ninth digit of the routing number and must meet the following condition.

3(d1 + d4 + d7) + 7(d2 + d5 + d8) + (d3 + d6 + d9) mod 10 = 0
(Mod or modulo is the remainder of a division operation.)

As an example: 011900571 is a routing number of Bank Of America, Virginia. So as per chequesum calculation method -

 0 1 1 9 0 0 5 7 1 D1 D2 D3 D4 D5 D6 D7 D8 D9

3(0 + 9 + 5) + 7(1 + 0 + 7) + (1 + 0 + 1) =100
100 mod 10 = 0

#### ABA PREFIX TABLE

This table is up to date as of 2020. One weakness of the current routing table arrangement is that various territories like American Samoa, Guam, Puerto Rico and the US Virgin Islands share the same routing code.

Prefix Location
1New York, NY
2Chicago, IL
4St. Louis, MO
5Boston, MA
6Cleveland, OH
7Baltimore, MD
8Pittsburgh, PA
9Detroit, MI
10Buffalo, NY
11San Francisco, CA
12Milwaukee, WI
13Cincinnati, OH
14New Orleans, LA
15Washington D.C.
16Los Angeles, CA
17Minneapolis, MN
18Kansas City, MO
19Seattle, WA
20Indianapolis, IN
21Louisville, KY
22St. Paul, MN
23Denver, CO
24Portland, OR
25Columbus, OH
26Memphis, TN
27Omaha, NE
28Spokane, WA
29Albany, NY
30San Antonio, TX
31Salt Lake City, UT
32Dallas, TX
33Des Moines, IA
34Tacoma, WA
35Houston, TX
36St. Joseph, MO
37Fort Worth, TX
38Savannah, GA
39Oklahoma City, OK
40Wichita, KS
41Sioux City, IA
42Pueblo, CO
43Lincoln, NE
44Topeka, KS
45Dubuque, IA
46Galveston, TX
47Cedar Rapids, IA
48Waco, TX
49Muskogee, OK
50New York
51Connecticut
52Maine
53Massachusetts
54New Hampshire
55New Jersey
56Ohio
57Rhode Island
58Vermont
59Hawaii
60Pennsylvania
61Alabama
62Delaware
63Florida
64Georgia
65Maryland
66North Carolina
67South Carolina
68Virginia
69West Virginia
70Illinois
71Indiana
72Iowa
73Kentucky
74Michigan
75Minnesota
77North Dakota
78South Dakota
79Wisconsin
80Missouri
81Arkansas
83Kansas
84Louisiana
85Mississippi
86Oklahoma
87Tennessee
88Texas