Area Code 810 is the Thumb of Michigan, including some of central Michigan, so it's not all 8XX. Unsure how they draw the line, but 800 and 888 are the two that

Area Code 810 is the Thumb of Michigan, including some of central Michigan, so it's not all 8XX. Unsure how they draw the line, but 800 and 888 are the two that I see businesses use for toll free calling.