About this number
(512) 878 is a landline based telephone number operated by Grande Communications Networks and is located in zip code 78666 in the city of San Marcos, Texas, which is in Hays County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 512 and Network Numbering Exchange (NXX - also known as a prefix) of 878. It has an Operating Company Number (OCN) of 7670. A Common Language Location Identifier (CLLI) of SMRCTXXAH01. As well as a Local access and transport area (LATA) of 558. Zip code 78666 has a population of 63,836 as of the 2010 census.