San Lorenzo Phone Number Lookup (CA)

Why People Use Reverse Phone Lookup in San Lorenzo

Got a phone call or message from a San Lorenzo, 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 San Lorenzo, CA, is 29,581. 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.

How to report a fraudulent call in San Lorenzo?

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? San Lorenzo is primarily located in Alameda County, which, according to U.S. Census Bureau data, includes 36,200 firms and 41,999 establishments employing 720,879 people.

County	Percent of City	Firms	Establishments
Alameda	100.00%	36200	41999

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.

San Lorenzo Area Code and Phone Number Format

San Lorenzo area codes are 510. 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

Phone Number Search in Other California Cities

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!

Reverse Phone Lookup San Lorenzo, CA