Look up any phone number starting with 310 to identify the owner name, address, spam reports, and more. The 310 area code is serving the West Los Angeles and South Bay areas of Los Angeles County, a small portion of Ventura County, and Santa Catalina Island in California.
Look Up a 310 Phone Number
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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Where Is Area Code 310 Located?
Area code 310 covers the West Los Angeles and South Bay areas of Los Angeles County, a small portion of Ventura County, and Santa Catalina Island.
Area code
424
was added as an overlay to the 310 area code on July 26, 2006. Both 310 and 424 serve the same geographic region. Since December 31, 2005, ten-digit dialing (1 + area code + seven-digit number) is required when placing calls between these area codes and to other area codes.
Area Code 310 Location Map
Area code 310 is a general purpose code which was placed in service on November 2, 1991.
Phone Number Prefixes and Carriers
Our California phone number lookup for the 310 area code analyzes the three-digit prefix to identify the initially assigned telecommunications company and rate center. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
NPA- 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.
Prefixes by Company
Company
Number of Prefixes
PACIFIC BELL
240
FRONTIER CALIFORNIA INC.
137
NEW CINGULAR WIRELESS PCS, LLC
67
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
56
SPRINT SPECTRUM, L.P.
51
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA
27
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
22
LEVEL 3 COMMUNICATIONS, LLC - CA
16
T-MOBILE USA, INC.
16
TELEPORT COMMUNICATIONS AMERICA, LLC - CA
14
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
12
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA
9
ONVOY, LLC - CA
8
AT&T - LOCAL
6
GLOBAL CROSSING LOCAL SERVICES, INC. - CA
6
PACIFIC BELL (COMPETITIVE)
6
XO CALIFORNIA, INC.
6
USA MOBILITY WIRELESS, INC.
4
33 WIRELESS INC.
3
AMERICAN MESSAGING SERVICES, LLC
3
BANDWIDTH.COM CLEC, LLC - CA
3
O1 COMMUNICATIONS, INC. - CA
3
PEERLESS NETWORK OF CALIFORNIA, LLC - CA
2
INTEGRATED PATH COMMUNICATIONS, LLC - CA
1
NORTH COUNTY COMMUNICATION CORPORATION - CA
1
PAETEC COMMUNICATIONS, INC. - CA
1
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
Prefixes by Rate Center
Rate Center
Number of Prefixes
BEVERLYHLS
107
CMTN GRDN
105
SNMN SNMN
73
W ANGELES
68
SNMN MRVS
52
INGLEWOOD
48
REDONDO
43
EL SEGUNDO
37
CULVERCITY
35
CMTN CMTN
33
SAN PEDRO
33
TORRANCE
31
HAWTHORNE
26
LOMITA
13
MALIBU
11
AVALON
3
LAKEWOOD
2
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