About this number
(520) 743 is a landline based telephone number operated by Qwest Corporation and is located in zip code 85705 in the city of Tucson, Arizona, which is in Pima 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 743. It has an Operating Company Number (OCN) of 9636. A Common Language Location Identifier (CLLI) of TCSNAZWERS1. As well as a Local access and transport area (LATA) of 668. Zip code 85705 has a population of 57,521 as of the 2010 census.