Area code 415 serves San Francisco and Marin County, California, but there is no 138 prefix. Telephone prefixes in North America (USA, Canada, etc.) cannot begin with 1.
The 415-314 prefix is in San Francisco, CA.
Area code 415 serves most of San Francisco and Marin County, California, plus a small part of northern San Mateo County. The 415-601 prefix is assigned to San Francisco.
North American area code +1 415 is San Francisco, California.
North American area code +1 415 is San Francisco CA and most of Marin County, plus a small part of San Mateo County. Effective March 21, 2015, area code 628 will be added as an overlay on 415, serving the same communities. Existing telephone numbers in area code 415 will not change; however, you will have to dial 1+area code+number for all calls to, from, or within the 415/628 area.
San Francisco, California, is mostly in telephone area code +1 415. The San Francisco International Airport, along with small portion on the southern edge of the city, are in area code +1 650, and several other area codes are used in the metropolitan area. Furthermore, area code +1 628 will be added as an overlay of +1 415 in 2015.The international access prefix for outbound international calls from San Francisco (or any other part of the USA and Canada) is 011.(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.)
San Quentin is located in area code +1 415.
The country code and area code of Nueva Carrara, Uruguay is 598, (0)415.
The country code and area code of Dandong- LN, China is 86, (0)415.
415=sf,ca ======= 415 is the area code for San Francisco, CA there is 8 hrs time difference between San Francisco and UK. =======
The country code and area code of Kamchatka region, Russian Federation is 7, (8)415.
In North America (USA, Canada, etc.), telephone area code 628 has been assigned as an overlay on area code 415, serving San Francisco, California, and most of Marin County. The overlay will take effect on March 21, 2015. Existing telephone numbers in area code 415 will not change; however, you will have to dial 1+area code+number for all calls to, from, or within the 415/628 area. The overlay code 628 was originally assigned in 1999, but was postponed until 2015.
Probably 415.