Covering Sana Cruz and Salinas, the 831 area code has secured itself two cities â¦ 831 is an area code located in the state of California, US. There have been a total of 1567 Numbers for this area code. Location, time zone and map of the 831 area code 831 Area Code is part of 3 counties in the state of California. The 831 area code was created as a split from the original 408 area code in the late 1990s. There are around 39 cities in the 831 area code. Area code 831 is an area code that covers Western central California. View the 831 area code map, major cities, location, timezone and more on TeraCodes.com. Learn which area is covered under the code 831, along with the service provider that works with this code. You can also find the location of a caller whose number begins with 831. 831 Area Code. The largest city it serves is Salinas. 831 The international country codes, City Code, Area Code or Dialing Code listed on this table are for your information only. Our service has a very large database, which includes all area codes in the United States. It covers roughly 3,684,000 unique phone numbers and 479,434 individuals near the cities of Salinas, Santa Cruz, and Watsonville. California Area Code 831. The 831 Area Code is located in the state of California. Area code 831 is located in California and includes Salinas. To faciltiate the millions of phone users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas. Area code 831 is a telephone area code in the North American Numbering Plan (NANP) for a small region of the U.S. state of California.The numbering plan area (NPA) comprises Monterey County, San Benito County, and Santa Cruz County.The area code was created on July 11, 1998 in a split from area code 408. USA.com / All Area Codes / California / 831 Area Code. The Pacific Standard Time time zone is also known as America/Los_Angeles. The 831 area code is located in the Pacific Standard Time timezone. 831 Area Code belongs to the state of California. Basic Info Map Local Time 201 Covered Zip Codes California More Info . We cannot guarantee all information on this table are correct and updated. If you are looking for the area code for a particular city, you can search area codes by city using our area code â¦ The following cities fall under this area code: Hollister, Marina, Monterey, Salinas, Santa Cruz, Seaside, Watsonville. Area Code 831 Area Code 831 Covers These States. California (CA) Area Code 831 covers 4 Counties To find information on a specific area code, use the area code lookup that makes it easy to find an area code by number and gives detailed information including city/state, timezone, and area code maps. Area Code 831 is one of the 269 3-digit telephone area codes in the USA. Cities that use 831 area code and a coverage map included as well. Prefix; Browse Numbers Like 831-200-ABCD: Browse Numbers Like 831-201-ABCD: Browse Numbers Like 831-203-ABCD: Browse Numbers Like 831-204-ABCD: Browse Numbers Like 831-205-ABCD: Browse Numbers Like 831-206-ABCD: Browse Numbers Like 831-207-ABCD: Browse Numbers Like 831-210-ABCD: California has an avarage population of 38,332,521 spread between the coordinates of +37.052970 Latitude and -121.949418 Longitude.