About this number
(661) 678 is a landline based telephone number operated by At&T Local and is located in zip code 91403 in the city of Sherman Oaks, California, which is in Los Angeles County, and is in the West. It has a Number Planning Area (NPA - also known as an Area Code) of 661 and Network Numbering Exchange (NXX - also known as a prefix) of 678. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of SHOKCA02DS2. As well as a Local access and transport area (LATA) of 730. Zip code 91403 has a population of 23,484 as of the 2010 census.