415 Area Code: San Francisco & Marin County

415 · San Francisco

What is the area code for San Francisco?

The area code for San Francisco, California is 415, with overlay code 628 sharing the same geographic footprint. The 415 area code is a North American Numbering Plan geographic code assigned in 1947, covering the San Francisco and Marin County region. It serves approximately 1,000,000 residents on the Pacific Time (PT) (UTC-8 / UTC-7 DST).

The 415 area code has 785 assigned central-office prefixes (NXX codes, the three digits after the area code) across 14 rate centers, with numbers allocated to roughly 45 carriers.

At 785 of the ~792 usable central-office prefixes, the 415 area code has about 99% of its numbering capacity assigned, and that near-exhaustion is part of why overlay code 628 was added to the region. See how 415 compares in our NXX prefix allocation analysis across 338 US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Where is area code 415? Location and map area

Area code 415 is located in California, the United States. Its coverage area centers on San Francisco and spans the San Francisco and Marin County region. If you received a call from a 415 number, the caller's number was assigned in this area — though with number porting and virtual numbers, the person may be calling from anywhere.

The 415 location sits in Pacific Time (PT), so local business hours run roughly 9 a.m.–5 p.m. PT. Neighboring California area codes include 209, 213, 279.

For the full story — every city covered, overlay history, and local scam patterns — read the complete San Francisco area code guide.

All San Francisco area codes

San Francisco is served by 3 area codes across the metro area. 415 is the original 1947 code; the others were added as overlays or for surrounding suburbs.

• 415 (current page) — San Francisco proper + Marin County (1947 original)
• 628 — SF/Marin overlay (628 over 415, since 2015)
• 650 — San Mateo County / peninsula — Palo Alto, Redwood City

Cities served by the 415 area code

The 415 area code covers 5 major cities and towns across the San Francisco and Marin County region (CA):

Businesses across San Francisco and surrounding cities use 415 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.

415 area code time zone and business hours

The 415 area code is in the Pacific Time (PT) zone (UTC-8 / UTC-7 DST). Standard business hours in 415 run 9 AM to 5 PM PT.

If you're calling into 415 from a different time zone, factor in the offset. For example, an Eastern Time business calling 415 at 9 AM ET reaches San Francisco at 6 AM PT — likely outside standard business hours.

History of the 415 area code

The 415 area code was one of the original 86 area codes assigned in 1947 when the North American Numbering Plan was first deployed. As San Francisco grew and number demand increased, overlay code 628 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.

• 1947 415 entered service (one of the 86 original NANP area codes)
• 2015 628 added to serve the same region

The 415 area code in popular culture

415 is the area code of San Francisco and a recognized identifier for the Bay Area tech industry. Original startup founders, venture firms, and SF media outlets favor 415 numbers; 415 also references San Francisco's pre-Silicon Valley cultural identity.

Is the 415 area code safe? Spam and scam calls

415 is a legitimate geographic area code for San Francisco — it is not a scam code or a premium-rate prefix, and a call from a 415 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.

If you get an unexpected 415 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov.

The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real San Francisco business will leave a clear voicemail and will not pressure you.

US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 415 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.

Why get a 415 area code number for your business?

Getting a 415 number gives your business three measurable advantages over a toll-free or out-of-area number:

1. Local trust signal. Customers in San Francisco recognize 415 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
2. Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
3. Targeted marketing. Businesses serving San Francisco and the broader San Francisco and Marin County can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.

For businesses in San Francisco and surrounding cities, top industries that benefit from local 415 presence include Tech, Entertainment, and Healthcare. DialPhone's AI receptionist is available for every 415 number — never miss a call, even after standard business hours.

How to get a 415 area code number

Setting up a 415 business number with DialPhone takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available 415 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
3. Choose your number and configure. Assign your new 415 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a 415 number? Free number porting in 2 to 5 business days with zero service interruption.

New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.

415 area code overlay codes

The San Francisco and Marin County region is served by multiple overlay area codes:

Area Code	Coverage
415	Primary area code for San Francisco and Marin County, assigned 1947
628	Overlay — same geography (assigned 2015)

All overlay codes serve the same San Francisco region. New subscribers may be assigned any available code; existing numbers retain their original prefix.

AI receptionist for 415 area code businesses

Every DialPhone 415 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.

For businesses in San Francisco that handle high call volume, run extended hours, or need bilingual support (especially valuable in multilingual metros like San Francisco), the AI receptionist reduces voicemail backlog and improves first-call resolution.

HIPAA-compliant 415 numbers for healthcare

San Francisco has one of the largest healthcare systems in California. DialPhone signs HIPAA Business Associate Agreements on the Advanced plan ($34/user) and above, covering all 415 area code phone numbers, business SMS, and AI receptionist features.

Medical practices, telehealth groups, and behavioral health providers in the San Francisco and Marin County region can use DialPhone 415 numbers for patient calls, appointment reminders, and post-visit follow-up. See the DialPhone healthcare solutions page for compliance details.

All area codes in California

California has 40 active geographic area codes. The 415 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.

Nearby area codes

Related area codes in California and the Pacific Time (PT) region:

• 209 area code — Stockton, California
• 213 area code — Los Angeles, California
• 279 area code — Sacramento, California
• 310 area code — Los Angeles, California
• 323 area code — Los Angeles, California
• 341 area code — Oakland, California

All California area codes → · Browse all US area codes →

More area codes: ← 414 Milwaukee · 416 Toronto →

How this page is verified

DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 415 region.

What to know before getting a 415 number

• Number availability is finite. Popular San Francisco area codes can be inventory-constrained — request specific vanity patterns early.
• Porting timing varies. Most 415 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
• HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.