Frequently Asked Questions
San Francisco and Marin County are primarily covered by area code 415.
Area code 415 was established in 1947 as one of the original North American area codes.
New area codes like 510, 650, and 628 were introduced to accommodate the growing population and demand for phone numbers in the region originally served by 415.
Novato, CA is located within area code 415.
Yes, ten-digit dialing (including the area code) is mandatory for all calls within area code 415, and eleven-digit dialing is required from landlines.
The California Public Utilities Commission (CPUC) oversees compliance with telecommunications regulations for area code 415.
Area code 415 offers landline, wireless, and VoIP services.
Area code 628 was added as an overlay to area code 415 in 2015.
Area code 415 primarily serves San Francisco and Marin County, and partially serves San Mateo County.
The North American Numbering Plan (NANP) is a numbering plan for telephone calls within the US and other countries, and area code 415 is part of it.
Area codes 707 (1959), 510 (1991), and 650 (1997) were created by splitting the original 415 area code.
San Rafael, CA is located at approximately 37.97353 latitude and -122.53109 longitude.
San Francisco, California primarily uses area code 415. It also uses the overlay area code 628, which was added in 2015 to accommodate the growing demand for phone numbers. Marin County and parts of San Mateo County also fall under area code 415.
Dialing a 415 number from a landline requires 11 digits. You should dial 1 + area code + 7-digit number. Ten-digit dialing is mandatory for other types of calls, and these requirements are regulated by the California Public Utilities Commission (CPUC).
Area code 415 was established in 1947 as one of the original North American area codes. Over time, new area codes like 916, 707, 510, 650, and 628 were introduced to accommodate growth and split regions. Area code 628 was added to 415 in 2015 as an overlay.
Area code 415 covers San Francisco, Marin County, and parts of San Mateo County in California. Cities like Novato and San Rafael in Marin County, and South San Francisco in San Mateo County are included in the 415 area code. San Francisco, with landmarks like the Golden Gate Bridge, is also covered.
San Francisco has two area codes, 415 and 628, due to increased demand for phone numbers. Originally, 415 served the entire area. However, population growth and technological advancements necessitated the addition of 628 as an overlay in 2015. This ensures continued availability of phone numbers.
Area code 628 was added to San Francisco in 2015. It serves as an overlay to the existing 415 area code. The introduction of 628 ensures continued availability of phone numbers to accommodate the region's growing demand.
The North American Numbering Plan Area (NPA) code for 415 is, simply, 415. This code is part of the North American Numbering Plan (NANP), established in 1947. Area code 415 primarily serves San Francisco and Marin County, California.
Area code 415 covers San Francisco, Marin County, and parts of San Mateo County, California. It was one of the original area codes established in 1947. The area includes cities like Novato, San Rafael, and South San Francisco.
Area code 415 offers landline, wireless, and VoIP telecommunications services. These are provided by various major carriers, ensuring a diverse range of options for residents and businesses in the area.
The California Public Utilities Commission (CPUC) regulates area code 415. The CPUC oversees compliance with telecommunications regulations, including dialing requirements and number allocation, within the 415 area code, along with adherence to NANPA guidelines.
Eleven-digit dialing (1 + area code + number) is required when making calls from a landline within or to area code 415. This practice ensures accurate call routing. Ten-digit dialing is mandatory for other types of calls.
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Complete Guide to Area Code 415: Coverage, Cities, and Regulatory Insights
Area Code 415 is integral to California's telecommunications, serving San Francisco and Marin County. This guide provides a comprehensive overview of its technical specifications, geographic coverage, and regulatory framework.
What is Area Code 415 and Where is it Located?
Area Code 415 is part of the North American Numbering Plan (NANP), established in 1947. It primarily covers San Francisco and Marin County in California. Originally one of the first area codes, it has evolved to accommodate the region's growing population and technological demands.
Technical Specifications
Geographic Coverage and Major Cities
Area Code 415 serves a vibrant and densely populated region, including:
Key Cities in Area Code 415
Numbering Statistics
Telecommunications Infrastructure
Major Carriers
The area code is serviced by several major carriers, ensuring a wide range of telecommunications services, including landline, wireless, and VoIP.
Services Offered
Regulatory Framework
Historical Milestones
Conclusion
Area Code 415 remains a vital part of California's telecommunications network, reflecting the region's growth and technological advancement. The introduction of area code 628 ensures continued availability of phone numbers in this bustling area.
For more detailed regulatory information, visit the California Public Utilities Commission or NANPA. If you're interested in exploring more area codes in California, check out our related articles.