USA Area Codes
Area Code Diamond Bar 909
Area Code: The city of Diamond Bar is located in the state of California (Los Angeles county). Sacramento is the state capital of California. The area code of Diamond Bar is 909. For local calls is no area code required.
If you want to call from Sacramento to Diamond Bar you have to dial +1 909 and the telephone number of the person you want to reach.
The following list shows Cities located close to Diamond Bar:
Last change: 23.04.2007
