United States · USA
San Mateo, CA (+9) dialing code
San Mateo, CA (+9) · San Mateo, CA (+9)
Dialing code
+1 650
From abroad
+1 650 123-4567
Dial +1, then the city code 650, then the phone number without the leading zero.
Within the country
1650 123-4567
Dial 1650 followed by the phone number.
How to call San Mateo, CA (+9)?
To call San Mateo, CA (+9) in United States from abroad, dial the international code +1, followed by the city code 650, then the local number without the leading zero.