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I used to bank with Great Western Bank (GWB). Now that First Interstate has acquired GWB, what routing number should I use?

Service: Online Banking | Updated: April 12th, 2023


Use First Interstate's routing number: 092901683.

The following old Great Western Bank routing numbers will soon be retired. 

  • 304971987
  • 273970365
  • 104000702
  • 073900975
  • 073920845
  • 107006004
  • 291471066
  • 091408734
  • 291471134

If you still need to order your First Interstate checks, revise your routing number, or update your electronic payments to the First Interstate routing number (092901683), please do so immediately. Failure to update your routing number after may disrupt service and return checks.

For assistance or questions, contact the Client Support Center at 855-342-3400 Monday through Friday, 7:30 a.m. to 7:00 p.m. Mountain Time, and Saturdays, 10:00 a.m. to 2:00 p.m. Mountain Time.

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