Former Great Western Bank (GWB) clients, you must update your routing number.
Effective immediately, checks using a routing number other than First Interstate Bank’s (092901683) will be returned. Clients must update their routing numbers; failure to do so will result in returned checks and rejected electronic payments.
To order new checks, visit your local branch or log in to Online Banking via firstinterstate.com to place an order. Once logged in, select "More" from the main menu, then select "Reorder Checks" from the drop-down list. You may bring any old check stock into your local branch to be destroyed.
If you have questions, need assistance ordering checks, or need support updating your electronic payment information, please connect with your local banker or call our Client Contact Center at 855-342-3400. Representatives are available Monday-Friday from 7:30 a.m. to 7 p.m. MT and Saturday from 9 a.m. to 2 p.m. MT.