IOI Headquarters
25325 Leer Dr.
Elkhart, IN, 46514

Main: (574) 262-2800
Toll Free: (888) 697-0021
Main Fax: (574) 206-0072
Tax Fax: (574) 206-2369

IOI
P.O. Box 2808
Elkhart, IN 46515

Tax Department
P.O. Box 2868
Elkhart, IN 46515

Fort Wayne Location
6429 Oakbrook Parkway Suite A
Fort Wayne, IN 46825

Main: (260) 471-4746
Fax: (260) 471-4981

Chicago Location
225 West Washington
Suite 2200
Chicago, IL 60606

Main: (312) 924-2885
Fax: (312) 924-0201

Grand Rapids Location
Kentwood Corporate Complex
4595 Broadmoor
Suite 295
Kentwood, MI 49512

Main: (616) 871-0713
Fax: (616) 871-0717

Tampa Location
3111 W. Dr. M.L. King Jr., Blvd.
Suite 100
Tampa, FL 33607

Main: (813) 350-7836
Fax: (813) 350-7801

Phoenix Location
1414 West Broadway Rd.
Suite 220
Tempe, Arizona 85282

Main: (480) 619-4110
Fax: (480) 619-4115