What is the country code for Sacramento US?

The telephone country code for the United States is +1. Sacramento, California, is in area code +1 916.

The internet country code for the United States is .us.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)