Hannibal, MO

ZIP code 63401 is located in Hannibal, Missouri. This bustling area is known for its rich history and connection to Mark Twain, with landmarks such as the Mark Twain Boyhood Home & Museum and the Mark Twain Riverboat offering a glimpse into the author's life. Visitors can also explore the famous Rockcliffe Mansion and the Hannibal History Museum, making it a must-visit destination for history enthusiasts.