Reverse Phone Lookup Mill Valley, CA

Find out who called from that unknown Mill Valley number using our free reverse phone lookup service. Enter the full 10-digit number (including or any other US area code) to search for available caller information including name, address, phone carrier, and more.

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Local Time in Mill Valley, CA: 07:07 AM

Why People Use Reverse Phone Lookup in Mill Valley

Got a phone call or message from a Mill Valley, California phone number you don't recognize? Before you answer, call back, or reply, use our phone number lookup service to find out who's really on the other end, is it a scam, legitimate business or someone you'd rather avoid.

Identify Unknown Callers

The total population of Mill Valley, CA, is 14,456. That's thousands of potential callers you might not recognize: local business contacts, neighbors, service providers, or people from across the city.

An unknown caller could be anyone — a contractor you’ve been waiting to hear from, a sales call, or someone from your community who actually needs to reach you. Without knowing who’s calling, you might miss important local calls or waste time on calls you’d rather not answer.

Research Potential Scam Calls

Scam and spam calls continue to impact CA residents which, according to the National Do Not Call Registry Data Book, filed 287,916 complaints about unwanted calls in 2024. Of these, 161548 were robocalls, while 98127 involved live callers. The top complaint topics included imposters (27125), reducing debt (20756), medical and prescriptions (13374).

According to FTC 2024 data, CA residents reported 238,705 fraud cases in 2024, resulting in $1,678,703,608 in losses, with a median loss of $542 per victim. Given that more than 1 in 3 fraud attempts occur over the phone, verifying who is calling is critical for preventing financial losses.

If you receive fraudulent calls or suspect a scam attempt, report it to reportfraud.ftc.gov .

Additionally, protect your household by registering your phone numbers at donotcall.gov or by calling 1-888-382-1222 from the number you wish to register.

Verify California Businesses

Have you received a call from a business but aren’t sure if it’s really them?

County Percent of City Firms Establishments

Use our service to reverse-lookup unknown California phone numbers to verify whether they actually belong to a company before answering or calling back. By cross-referencing phone numbers with local business directories, you can ensure you’re dealing with legitimate local businesses, services, contractors, or vendors—not scammers spoofing local numbers to gain your trust.

Mill Valley Area Code and Phone Number Format

Mill Valley area codes are 415.

Phone numbers in California follow the following structure under the North American Numbering Plan:

  • - California area code (where the number was originally assigned)
  • NXX - Central office code that locates the specific neighborhood and identifies the service provider
  • XXXX - Subscriber number identifies the individual phone line within that local exchange

Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.

California Area Codes Map

Mill Valley, California Area Codes Map

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Phone Lookup Results May Include Available Information On:

  • Owner's Name
  • Current Address
  • Current Location
  • Family Members
  • Social Media Profiles
  • Images and Videos
  • Address History
  • Phone Type
  • Phone Carrier
  • Public Records
  • And Much More!

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