Routing transit number
Updated: 12/20/2025, 1:28:38 PM Wikipedia source
In the United States, an ABA routing transit number (ABA RTN) is a nine-digit code printed on the bottom of checks to identify the financial institution on which it was drawn. The American Bankers Association (ABA) developed the system in 1910 to facilitate the sorting, bundling, and delivering of paper checks to the drawer's (check writer's) bank for debit to the drawer's account. Newer electronic payment methods continue to rely on ABA RTNs to identify the paying bank or other financial institution. The Federal Reserve Bank uses ABA RTNs in processing Fedwire funds transfers. The ACH Network also uses ABA RTNs in processing direct deposits, bill payments, and other automated money transfers.
Tables
· Formats › MICR routing number format › Federal Reserve
01
01
Primary(01–12)
01
Thrift(+20)
21
Electronic(+60)
61
Federal Reserve Bank
Boston
02
02
Primary(01–12)
02
Thrift(+20)
22
Electronic(+60)
62
Federal Reserve Bank
New York
03
03
Primary(01–12)
03
Thrift(+20)
23
Electronic(+60)
63
Federal Reserve Bank
Philadelphia
04
04
Primary(01–12)
04
Thrift(+20)
24
Electronic(+60)
64
Federal Reserve Bank
Cleveland
05
05
Primary(01–12)
05
Thrift(+20)
25
Electronic(+60)
65
Federal Reserve Bank
Richmond
06
06
Primary(01–12)
06
Thrift(+20)
26
Electronic(+60)
66
Federal Reserve Bank
Atlanta
07
07
Primary(01–12)
07
Thrift(+20)
27
Electronic(+60)
67
Federal Reserve Bank
Chicago
08
08
Primary(01–12)
08
Thrift(+20)
28
Electronic(+60)
68
Federal Reserve Bank
St. Louis
09
09
Primary(01–12)
09
Thrift(+20)
29
Electronic(+60)
69
Federal Reserve Bank
Minneapolis
10
10
Primary(01–12)
10
Thrift(+20)
30
Electronic(+60)
70
Federal Reserve Bank
Kansas City
11
11
Primary(01–12)
11
Thrift(+20)
31
Electronic(+60)
71
Federal Reserve Bank
Dallas
12
12
Primary(01–12)
12
Thrift(+20)
32
Electronic(+60)
72
Federal Reserve Bank
San Francisco
| Primary(01–12) | Thrift(+20) | Electronic(+60) | Federal Reserve Bank |
| 01 | 21 | 61 | Boston |
| 02 | 22 | 62 | New York |
| 03 | 23 | 63 | Philadelphia |
| 04 | 24 | 64 | Cleveland |
| 05 | 25 | 65 | Richmond |
| 06 | 26 | 66 | Atlanta |
| 07 | 27 | 67 | Chicago |
| 08 | 28 | 68 | St. Louis |
| 09 | 29 | 69 | Minneapolis |
| 10 | 30 | 70 | Kansas City |
| 11 | 31 | 71 | Dallas |
| 12 | 32 | 72 | San Francisco |
· Formats › Fraction format › ABA prefix table
1
1
Prefix
1
Location
New York, NY
2
2
Prefix
2
Location
Chicago, IL
3
3
Prefix
3
Location
Philadelphia, PA
4
4
Prefix
4
Location
St. Louis, MO
5
5
Prefix
5
Location
Boston, MA
6
6
Prefix
6
Location
Cleveland, OH
7
7
Prefix
7
Location
Baltimore, MD
8
8
Prefix
8
Location
Pittsburgh, PA
9
9
Prefix
9
Location
Detroit, MI
10
10
Prefix
10
Location
Buffalo, NY
11
11
Prefix
11
Location
San Francisco, CA
12
12
Prefix
12
Location
Milwaukee, WI
13
13
Prefix
13
Location
Cincinnati, OH
14
14
Prefix
14
Location
New Orleans, LA
15
15
Prefix
15
Location
Washington D.C.
16
16
Prefix
16
Location
Los Angeles, CA
17
17
Prefix
17
Location
Minneapolis, MN
18
18
Prefix
18
Location
Kansas City, MO
19
19
Prefix
19
Location
Seattle, WA
20
20
Prefix
20
Location
Indianapolis, IN
21
21
Prefix
21
Location
Louisville, KY
22
22
Prefix
22
Location
St. Paul, MN
23
23
Prefix
23
Location
Denver, CO
24
24
Prefix
24
Location
Portland, OR
25
25
Prefix
25
Location
Columbus, OH
26
26
Prefix
26
Location
Memphis, TN
27
27
Prefix
27
Location
Omaha, NE
28
28
Prefix
28
Location
Spokane, WA
29
29
Prefix
29
Location
Albany, NY
30
30
Prefix
30
Location
San Antonio, TX
31
31
Prefix
31
Location
Salt Lake City, UT
32
32
Prefix
32
Location
Dallas, TX
33
33
Prefix
33
Location
Des Moines, IA
34
34
Prefix
34
Location
Tacoma, WA
35
35
Prefix
35
Location
Houston, TX
36
36
Prefix
36
Location
St. Joseph, MO
37
37
Prefix
37
Location
Fort Worth, TX
38
38
Prefix
38
Location
Savannah, GA
39
39
Prefix
39
Location
Oklahoma City, OK
40
40
Prefix
40
Location
Wichita, KS
41
41
Prefix
41
Location
Sioux City, IA
42
42
Prefix
42
Location
Pueblo, CO
43
43
Prefix
43
Location
Lincoln, NE
44
44
Prefix
44
Location
Topeka, KS
45
45
Prefix
45
Location
Dubuque, IA
46
46
Prefix
46
Location
Galveston, TX
47
47
Prefix
47
Location
Cedar Rapids, IA
48
48
Prefix
48
Location
Waco, TX
49
49
Prefix
49
Location
Muskogee, OK
50
50
Prefix
50
Location
New York
51
51
Prefix
51
Location
Connecticut
52
52
Prefix
52
Location
Maine
53
53
Prefix
53
Location
Massachusetts
54
54
Prefix
54
Location
New Hampshire
55
55
Prefix
55
Location
New Jersey
56
56
Prefix
56
Location
Ohio
57
57
Prefix
57
Location
Rhode Island
58
58
Prefix
58
Location
Vermont
59
59
Prefix
59
Location
Hawaii
60
60
Prefix
60
Location
Pennsylvania
61
61
Prefix
61
Location
Alabama
62
62
Prefix
62
Location
Delaware
63
63
Prefix
63
Location
Florida
64
64
Prefix
64
Location
Georgia
65
65
Prefix
65
Location
Maryland
66
66
Prefix
66
Location
North Carolina
67
67
Prefix
67
Location
South Carolina
68
68
Prefix
68
Location
Virginia
69
69
Prefix
69
Location
West Virginia
70
70
Prefix
70
Location
Illinois
71
71
Prefix
71
Location
Indiana
72
72
Prefix
72
Location
Iowa
73
73
Prefix
73
Location
Kentucky
74
74
Prefix
74
Location
Michigan
75
75
Prefix
75
Location
Minnesota
76
76
Prefix
76
Location
Nebraska
77
77
Prefix
77
Location
North Dakota
78
78
Prefix
78
Location
South Dakota
79
79
Prefix
79
Location
Wisconsin
80
80
Prefix
80
Location
Missouri
81
81
Prefix
81
Location
Arkansas
82
82
Prefix
82
Location
Colorado
83
83
Prefix
83
Location
Kansas
84
84
Prefix
84
Location
Louisiana
85
85
Prefix
85
Location
Mississippi
86
86
Prefix
86
Location
Oklahoma
87
87
Prefix
87
Location
Tennessee
88
88
Prefix
88
Location
Texas
89
89
Prefix
89
Location
Alaska
90
90
Prefix
90
Location
California
91
91
Prefix
91
Location
Arizona
92
92
Prefix
92
Location
Idaho
93
93
Prefix
93
Location
Montana
94
94
Prefix
94
Location
Nevada
95
95
Prefix
95
Location
New Mexico
96
96
Prefix
96
Location
Oregon
97
97
Prefix
97
Location
Utah
98
98
Prefix
98
Location
Washington
99
99
Prefix
99
Location
Wyoming
101
101
Prefix
101
Location
American Samoa, Guam, Puerto Rico, Virgin Islands
| 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 |
References
- Bankers' Hotline 2004
- "Accuity Becomes First Authorized Re-distributor of SWIFT's Bank Identification Codes | Accuity"https://web.archive.org/web/20080403170350/http://www.accuitysolutions.com/co-press-release.html?id=20080114QK8G3EH8
- "FRB Financial Services - All Services"https://web.archive.org/web/20080828003522/http://www.fededirectory.frb.org/
- McNally, pp. 497–512
- McNally, p. V
- McNally, p. VIII
- McNally, p. III
- McNally, pp. V-VI
- McNally, pp. VI-VIII
- McNally, p. VI
- RM Acq, p. Our History
- Acuity, Bankers', p. About us
- Reed Elsevier, p. Our history
- ABA, p. Key to Routing Numbers—Accuity
- (Burnett 2005)