| Business | Phone |
| Winnebago Home Builders Assn 4041 State Road 91 A, Oshkosh 54904 | (920) 235-2962 |
| Eaa Membership Main 3000 Poberezny Rd, Oshkosh 54902 | (920) 426-5912 |
| National Assn/Sport Aircraft Po Box 3361, Oshkosh 54903 | (920) 466-9244 |
| Lake Michigan Phrf 3691 Fond Du Lac Rd, Oshkosh 54902 | (920) 426-5540 |