About this number
(641) 423 is a landline based telephone number operated by Qwest Corporation and is located in zip code 50401 in the city of Mason City, Iowa, which is in Cerro Gordo County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 641 and Network Numbering Exchange (NXX - also known as a prefix) of 423. It has an Operating Company Number (OCN) of 9631. A Common Language Location Identifier (CLLI) of MSCYIATCDS0. As well as a Local access and transport area (LATA) of 632. Zip code 50401 has a population of 29,837 as of the 2010 census.