What is what area code is 641?

Area code 641 is a North American Numbering Plan area code in the state of Iowa. It covers the central and southeastern part of the state, including cities such as Ames, Marshalltown, Mason City, Ottumwa, and Waterloo. Area code 641 was created in 2000 as an overlay to the existing area code 515 to accommodate the growing number of telephone numbers required in the region. Today, area code 641 serves a diverse and vibrant population with a mix of urban and rural communities.