Area Code Overview

Area code 707 is a geographic telephone area code in California that went into service on January 1, 1959. The geographic regions covered by this area code overlay has a population of approximately 1,389,531.

Overlay and Dialing Rules

Area Code: 707
State: California
Type: General Purpose Code
In Service Date: January 1, 1959
Overlay Complex: 369/707
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 707

This area code is ranked 115th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 20th out of 39.

6,029,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 707

Total assigned 6,029,000

Wireless

1,969,000 assigned

32.66%

Wireline and VoIP

3,531,000 assigned

58.57%

Other / Unclassified

529,000 assigned

8.77%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 707

Estimated assigned wireless phone numbers: 1,969,000

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

AT&T Wireless 725,000 (36.82%)

T-Mobile 590,000 (29.96%)

Verizon Wireless 574,000 (29.15%)

UScellular 77,000 (3.91%)

Optimum Mobile 3,000 (0.15%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 707

Estimated assigned wireline and VoIP phone numbers: 3,531,000

AT&T 1,129,000 (31.97%)

Onvoy 895,000 (25.35%)

Bandwidth 377,000 (10.68%)

Lumen 235,000 (6.66%)

Peerless Network 206,000 (5.83%)

Comcast Business 143,000 (4.05%)

Spectrum 93,000 (2.63%)

Telnyx 77,000 (2.18%)

TERRA NOVA TELECOM INC. 70,000 (1.98%)

UTILITY TELECOM GROUP, LLC - CA 65,000 (1.84%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 59,000 (1.67%)

SONIC TELECOM, LLC - CA 44,000 (1.25%)

Other / Unclassified Assigned Numbering in Area Code 707

Estimated assigned other or unclassified phone numbers: 529,000

IP HORIZON LLC 157,000 (29.68%)

AMERICAN MESSAGING SERVICES, LLC 90,000 (17.01%)

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 66,000 (12.48%)

INTEGRATED PATH COMMUNICATIONS, LLC - CA 53,000 (10.02%)

TELEPORT COMMUNICATIONS AMERICA, LLC - CA 48,000 (9.07%)

SPOK, INC. 40,000 (7.56%)

TON80 COMMUNICATIONS, LLC 26,000 (4.91%)

MCC TELEPHONY LLC 12,000 (2.27%)

NORTH COUNTY COMMUNICATION CORPORATION - CA 10,000 (1.89%)

WHITESKY COMMUNICATIONS, LLC 10,000 (1.89%)

FRACTEL, LLC 8,000 (1.51%)

HD CARRIER LLC 7,000 (1.32%)

Cities and Towns in Area Code 707

Annapolis, California Arcata, California Benicia, California Blue Lake, California Bodega Bay, California Boonville, California Bridgeville, California Calistoga, California Cazadero, California Clearlake Oaks, California Cloverdale, California Cobb, California Covelo, California Crescent City, California Dixon, California Elk, California Eureka, California Fairfield, California Ferndale, California Forestville, California Fort Bragg, California Fortuna, California Garberville, California Geyserville, California Gualala, California Guerneville, California Healdsburg, California Hopland, California Hydesville, California Kelseyville, California Kenwood, California Klamath, California Lake Berryessa, California Lakeport, California Laytonville, California Leggett, California Loleta, California Lower Lake, California Mad River, California Mendocino, California Middletown, California Miranda, California Monte Rio, California Napa, California Nice, California Occidental, California Orick, California Pepperwood, California Petaluma, California Petrolia, California Piercy, California Point Arena, California Potter Valley, California Rio Dell, California Rio Vista, California Saint Helena, California Santa Rosa, California Sebastopol, California Smith River, California Sonoma, California Tomales, California Trinidad, California Ukiah, California Upper Lake, California Vacaville, California Vallejo, California Valley Ford, California Weott, California Whitethorn, California Willits, California Windsor, California Yountville, California

These geographic regions are also served by area code 369.

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 707, 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