Routing Number | Bank Name | Bank Address | Phone Number | Change Date |
| 092905252 | 1ST INTERSTATE BANK | PO BOX 30918, BILLINGS, MT 59116-0918 | (406) 237-2827 | 2002-02-28 |
092900215 092901683 | 1ST INTERSTATE BK COMM MISSOULA OFC | PO BOX 30918, BILLINGS, MT 59116-0918 | (406) 237-2951 | 2007-02-26 |
| 292977349 | 1ST LIBERTY FEDERAL CU | 6200 3RD AVE N, GREAT FALLS, MT 59403-0000 | (406) 761-8300 | 2008-02-21 |
| 292977404 | 1ST LIBERTY FEDERAL CU | PO BOX 5002, GREAT FALLS, MT 59403-5002 | (406) 761-8300 | 2008-06-30 |
| 092901227 | AMERICAN BANK | P.O. BOX 2290, LIVINGSTON, MT 59047-2290 | (406) 222-2265 | 2004-11-05 |
| 292070806 | AMERICAN FEDERAL SAVINGS BANK | 1400 PROSPECT AVENUE, HELENA, MT 59604-0000 | (406) 442-3080 | 2004-02-04 |
292077579 292077511 | ARMED FORCES BR-HELENA COMM CU | PO BOX 159, HELENA, MT 59624-0000 | (406) 495-6066 | 2008-02-20 |
292976735 292977666 | AVANTA FCU, DOWNTOWN BRANCH | PO BOX 1815, BILLINGS, MT 59101-1815 | (406) 651-2328 | 2007-02-26 |
292976803 292977666 | AVANTA FEDERAL CREDIT UNION | 3212 CENTRAL AVENUE, BILLINGS, MT 59102-0000 | (406) 651-2328 | 2007-02-27 |
| 292977666 | AVANTA FEDERAL CREDIT UNION | 3212 CENTRAL, BILLINGS, MT 59102-0000 | (406) 651-2328 | 2008-02-21 |