Area Code Overview

Area code 951 is a geographic telephone area code in California that went into service on July 17, 2004. The geographic regions covered by this area code overlay has a population of approximately 2,584,554.

Overlay and Dialing Rules

Area Code: 951
State: California
Type: General Purpose Code
In Service Date: July 17, 2004
Overlay Complex: 951
Local Dialing Plan: This area requires you to dial 1 and the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 951

This area code is ranked 87th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 17th out of 39.

6,234,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 951

Total assigned 6,234,000

Wireless

3,144,000 assigned

50.43%

Wireline and VoIP

2,824,000 assigned

45.30%

Other / Unclassified

266,000 assigned

4.27%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 951

Estimated assigned wireless phone numbers: 3,144,000

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

T-Mobile 1,460,000 (46.44%)

Verizon Wireless 856,000 (27.23%)

AT&T Wireless 828,000 (26.34%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 951

Estimated assigned wireline and VoIP phone numbers: 2,824,000

Onvoy 675,000 (23.90%)

AT&T 557,000 (19.72%)

Verizon 442,000 (15.65%)

Bandwidth 316,000 (11.19%)

Lumen 202,000 (7.15%)

TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 128,000 (4.53%)

Spectrum 121,000 (4.28%)

Peerless Network 70,000 (2.48%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 63,000 (2.23%)

Commio 57,000 (2.02%)

PAETEC ITEL, LLC 52,000 (1.84%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 42,000 (1.49%)

Other / Unclassified Assigned Numbering in Area Code 951

Estimated assigned other or unclassified phone numbers: 266,000

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 68,000 (25.56%)

TELEPORT COMMUNICATIONS AMERICA, LLC - CA 59,000 (22.18%)

IP HORIZON LLC 43,000 (16.17%)

SHELCOMM 20,000 (7.52%)

INTEGRATED PATH COMMUNICATIONS, LLC - CA 17,000 (6.39%)

FRACTEL, LLC 14,000 (5.26%)

HD CARRIER LLC 13,000 (4.89%)

AMERICAN MESSAGING SERVICES, LLC 10,000 (3.76%)

TON80 COMMUNICATIONS, LLC 8,000 (3.01%)

BARR TELL USA, LLC 5,000 (1.88%)

MCC TELEPHONY OF THE WEST, LLC - CA 5,000 (1.88%)

DMR COMMUNICATIONS INC. - CA 3,000 (1.13%)

Cities and Towns in Area Code 951

Arlington, California Banning, California Colton, California Corona, California Elsinore, California Hemet, California Idyllwild, California Lakeview, California Mira Loma, California Moreno, California Murrieta, California Perris, California Riverside, California Sun City, California Temecula, California Temescal Valley, California Woodcrest, California

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 951, not live customer counts.

Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm