Westbrook Windom Winnebago Winona Winthrop Worthington Wykoff Zumbrota See also List of North American area codes References Area code history. AreaCode-Info.com. (2001). 1947 Area Code Assignment Map. GIF image at AreaCode-Info.com. External links NANPA: Minnesota area code map List of exchanges from AreaCodeDownload.com, 507 Area Code 507 507