Los Altos, California Phone Lookup

Q: How do I look up a phone number in Los Altos, California?

Enter the full 10-digit number into the search box and click Search. 411FCC returns the owner's name, location, carrier, and line type. The lookup covers all 1 area code serving Los Altos.

Q: What types of phone numbers are in Los Altos?

Los Altos has both wireless and landline numbers. Approximately 28% of prefixes are wireless, with 73% being landline or VoIP. 411FCC results identify the line type and carrier for any number searched.

Find the owner of any phone number in Los Altos, California.

What Phone Numbers Are in Los Altos, California?

Looking up a phone number in Los Altos, California? Enter any 10-digit phone number in the search box above to find the owner's name, address, and carrier information. Los Altos is served by 1 area code and has 27 active phone prefixes.

1 Area Code

27 Phone Prefixes

28% Wireless

73% Landline

Area Codes Serving Los Altos

Phone numbers in Los Altos, California use the following area code: 650.

Top Phone Carriers in Los Altos

The most common phone service providers in Los Altos include:

Onvoy, Llc - Ca
T-mobile Usa, Inc.
Level 3 Communications, Llc - Ca
Pacific Bell
Bandwidth.com Clec, Llc - Ca

Data current as of March 2026

Nearby Cities in California

Other cities in California that share area codes with Los Altos:

Los Altos at a Glance

30,698 Population

45.9 Median Age

$250,001 Median Income

11,781 Housing Units

82% Homeownership

Demographics

White 50.3%
Black 0.2%
Hispanic 6.1%
Asian 39%
Other 4.5%

Financial Profile

$611,575 Avg. Income per Return

$387,139 Avg. Wages per Return

11,040 Tax Returns Filed

1 ZIP Codes

Frequently Asked Questions

What Area Codes Serve Los Altos, California?

Phone numbers in Los Altos, California use 1 area code: 650. These area codes are shared with other cities in the region. Los Altos has 27 active phone prefixes assigned to local carriers. If you received a call from one of these area codes, enter the full 10-digit number into the search box above to find out who called. The area code alone tells you the general geographic region, but a full reverse phone lookup on 411FCC reveals the specific owner, carrier, and line type associated with the number.

How Do I Look Up a Phone Number in Los Altos, California?

To look up any phone number in Los Altos, enter the full 10-digit number into the search box at the top of this page and click Search. 411FCC returns available information about the number including the registered owner's name, location, phone carrier, and whether it is a wireless cell phone, landline, or VoIP line. The lookup covers all 1 area code serving Los Altos and works for numbers from every carrier in the area. Results appear within seconds. 411FCC has maintained its phone number database since 2003.

What Types of Phone Numbers Are in Los Altos?

Los Altos, California has both wireless and landline phone numbers. Approximately 28% of phone prefixes in the area are classified as wireless (cell phone), with the remaining 73% being landline or VoIP. Major carriers serving the area include Onvoy, Llc - Ca, T-mobile Usa, Inc., Level 3 Communications, Llc - Ca. When you search a phone number on 411FCC, the results identify the line type and carrier, which helps distinguish personal cell phones from business landlines and identify VoIP numbers commonly used by automated calling systems.