About this number
(520) 421 is a landline based telephone number operated by Qwest Corporation and is located in zip code 85222 in the city of Casa Grande, Arizona, which is in Pinal County, and is in the West. It has a Number Planning Area (NPA - also known as an Area Code) of 520 and Network Numbering Exchange (NXX - also known as a prefix) of 421. It has an Operating Company Number (OCN) of 9636. A Common Language Location Identifier (CLLI) of CSGRAZMADS0. As well as a Local access and transport area (LATA) of 666.