Steffes Agency Inc. Share: Insurance Steffes Agency Inc. Visit Website 1155 Burlington Dr. Suite B Bismarck, ND 58503 (701) 255-6144 (701) 222-0891 (fax) About Map About Steffes Agency is an independent insurance agency in Bismarck. We specialize in home, auto, umbrella, farm, bonds and business insurance. We invite you to call us for a free quote at 701-255-6144. What's Nearby? Distance: 5 10 15 20 25 50 mi.