San-Mateo Area Codes, California, Unites States

How to call San-Mateo, California?

San-Mateo has 1 area code. To call San-Mateo you need to dial the Unites States country code (+1) and the following area code:

650

How to know if I'm receiving calls from San-Mateo, California?

You are receiving calls from San-Mateo when the phone number starts with the following combination:

1-650

Other area codes in Unites States