- Home / 
- Bank aba routing numbers / 
- Community 1st credit union
You are Here - 
Get Detailed Information of any Bank Branch in USA.
How ItWorks
How To Use Our ABA Routing Number Finder Tool?
- 1. First select the bank name.
- 2. Next select the particular state name under which your above seletectd bank is located.
- 3. Select the particular city name accroding to the bank-branch you are looking for & which c*msunder the above seleted bank & state.
- 4. Lastly, please select the particular branch address which c*msunder the above selected bank, city & state.
// GUIDE //
Icons Info :
Refresh click to refresh corresponding list.
Stop field. Disabled/Not selected.
Tips :
For quickly find the particular bank name, state name, city name, branch address you can use the quick search tool above dropdown corresponding list.
Please look for the correctname of the bank,
e.g."Acadiana Medical Federal" isActually "Acadiana Medical Federal C U"
Or Validate ABA Routing Number  
Validate ABA Routing Number
How to Validate ABA Routing Number
If you have the ABA Routing Number of the particular bank branch & want to know the others information such as branch address, state, city, pin code, contact information & other details then enter the nine digits ABA Routing Number & click on "Get Bank Details" Button.
Or Select a State from these
IOWA 1 Branches
Format of Community 1st Credit Union ABA Routing Code
Community 1st Credit Union or any banks in USA Routing Number is nine digit unique identification number.
A routing number can have two forms
- 1. Fraction form
- 2. MICR (magnetic ink character recognition) form.
Both of the forms contain the same information. MICR form is the more commonly used, and fraction form is very rare to see in 2024.
In General :
The Combination is-
2 | 7 | X | X | Y | Y | Y | Y | Z |
Federal Reserve Routing Symbol | ABA Financial Institution Identifier | Cheque Digit | ||||||
In Detail Breakdown :
The Combination is-
2 | 7 | A | A | B | B | C | D | E |
Bank's Physical Location | Federal Reserve Bank the Institution's Electronic and Wire Transfers Will Route Through | Federal Reserve Cheque Processing Center | Federal Reserve District | Chequesum | ||||
- Within the 4 digits Federal Reserve Routing Symbol, the first two digits of the nine digits RTN must be in the ranges 00 through 12, 21 through 32, 61 through 72, or 80. The digits are assigned as mentioned below .
General Information About ABA Routing Number
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 account’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 |
| 3 | 23 | 63 | Philadelphia |
| 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 -
1 | 1 | 9 | 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 |
|---|---|
| 1 | New York, NY |
| 2 | Chicago, IL |
| 3 | Philadelphia, PA |
| 4 | St. Louis, MO |
| 5 | Boston, MA |
| 6 | Cleveland, OH |
| 7 | Baltimore, MD |
| 8 | Pittsburgh, PA |
| 9 | Detroit, MI |
| 10 | Buffalo, NY |
| 11 | San Francisco, CA |
| 12 | Milwaukee, WI |
| 13 | Cincinnati, OH |
| 14 | New Orleans, LA |
| 15 | Washington D.C. |
| 16 | Los Angeles, CA |
| 17 | Minneapolis, MN |
| 18 | Kansas City, MO |
| 19 | Seattle, WA |
| 20 | Indianapolis, IN |
| 21 | Louisville, KY |
| 22 | St. Paul, MN |
| 23 | Denver, CO |
| 24 | Portland, OR |
| 25 | Columbus, OH |
| 26 | Memphis, TN |
| 27 | Omaha, NE |
| 28 | Spokane, WA |
| 29 | Albany, NY |
| 30 | San Antonio, TX |
| 31 | Salt Lake City, UT |
| 32 | Dallas, TX |
| 33 | Des Moines, IA |
| 34 | Tacoma, WA |
| 35 | Houston, TX |
| 36 | St. Joseph, MO |
| 37 | Fort Worth, TX |
| 38 | Savannah, GA |
| 39 | Oklahoma City, OK |
| 40 | Wichita, KS |
| 41 | Sioux City, IA |
| 42 | Pueblo, CO |
| 43 | Lincoln, NE |
| 44 | Topeka, KS |
| 45 | Dubuque, IA |
| 46 | Galveston, TX |
| 47 | Cedar Rapids, IA |
| 48 | Waco, TX |
| 49 | Muskogee, OK |
| 50 | New York |
| 51 | Connecticut |
| 52 | Maine |
| 53 | Massachusetts |
| 54 | New Hampshire |
| 55 | New Jersey |
| 56 | Ohio |
| 57 | Rhode Island |
| 58 | Vermont |
| 59 | Hawaii |
| 60 | Pennsylvania |
| 61 | Alabama |
| 62 | Delaware |
| 63 | Florida |
| 64 | Georgia |
| 65 | Maryland |
| 66 | North Carolina |
| 67 | South Carolina |
| 68 | Virginia |
| 69 | West Virginia |
| 70 | Illinois |
| 71 | Indiana |
| 72 | Iowa |
| 73 | Kentucky |
| 74 | Michigan |
| 75 | Minnesota |
| 76 | Nebraska |
| 77 | North Dakota |
| 78 | South Dakota |
| 79 | Wisconsin |
| 80 | Missouri |
| 81 | Arkansas |
| 82 | Colorado |
| 83 | Kansas |
| 84 | Louisiana |
| 85 | Mississippi |
| 86 | Oklahoma |
| 87 | Tennessee |
| 88 | Texas |
| 89 | Alaska |
| 90 | California |
| 91 | Arizona |
| 92 | Idaho |
| 93 | Montana |
| 94 | Nevada |
| 95 | New Mexico |
| 96 | Oregon |
| 97 | Utah |
| 98 | Washington |
| 99 | Wyoming |
| 101 | American Samoa, Guam, Puerto Rico, Virgin Islands |
