CallataGuides

Area code 707

Where 707 is, how it is dialed, which carriers hold its numbers and how many of its codes are in use, from NANPA's 10/01/2026 files.

State
CA
In service
1959
Assigned codes
785of 800 possible
Carriers
36

Area code 707 at a glance

Area code 707 is a geographic area code in California, in service since January 1, 1959, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 707 and 369 cover the same territory, so neighbors on the same street can have different area codes. It is in the Pacific time zone. The places with the most assigned exchanges include Santa Rosa, Vallejo, Napa, Vacaville, and Eureka. By population, its largest named places are Santa Rosa, Vallejo, Vacaville, Napa, and Benicia.

Area code 707: NANPA facts
ItemValue
StateCalifornia
In service sinceJanuary 1, 1959
OverlayYes, with 369
Parent area code (NANPA)415
Time zonePacific
Local calls within the code1 plus ten digits
Assigned central office codes785
Rate centers with codes75
Carriers holding codes36
Pooled codes617
Codes assigned since 202052
Relief planning in progressNo

Source: NANPA NPA report and utilized central office code file, both dated 10/01/2026.

Where 707 numbers are local

707 holds 3.6% of the 22,087 central office codes assigned in California, the 12th most of the state's 41 codes. 28 Census places could be matched to rate centers with 707 exchanges; the most populous are Santa Rosa (178,000), Vallejo (123,000), Vacaville (104,000), and Napa (76,921). For a storefront or service area inside 707, the place pages show which prefixes are rated local there.

Most populous places with 707 exchanges
PlacePopulation (2024)Area codesExchangesCarriers
Santa Rosa, CA177,524369, 70715426
Vallejo, CA123,475369, 7075115
Vacaville, CA103,994369, 7073812
Napa, CA76,921369, 7074416
Benicia, CA26,477369, 7072311
Windsor, CA25,846369, 707117
Eureka, CA25,412369, 7073815
Dixon, CA20,296369, 707109
Arcata, CA18,748369, 707114
Ukiah, CA16,067369, 7072310
Fortuna, CA12,114369, 70765
Healdsburg, CA11,231369, 707106
Sonoma, CA10,606369, 7071811
Rio Vista, CA10,24870754
Cloverdale, CA8,78470765

Population: Census Vintage 2024 estimates for the matched place. Exchanges and carriers: NANPA utilized code file.

How calls are dialed in 707

According to NANPA's dialing-plan data, local calls within 707 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere.

Phone companies in area code 707

36 carriers hold the 785 central office codes assigned in 707. Pacific Bell has the most, with 224 (29%). 617 of the codes (79%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Largest code holders in area code 707
Carrier (NANPA operating company)ExchangesShare
Pacific Bell22429%
Onvoy, LLC - CA9612%
New Cingular Wireless PCS, LLC678.5%
Level 3 Communications, LLC - CA587.4%
Cellco Partnership d/b/a Verizon Wireless - CA557.0%
T-mobile USA, INC.313.9%
Metropcs, INC.283.6%
Teleport Communications America, LLC - CA243.1%
Bandwidth.com CLEC, LLC - CA243.1%
Mcimetro Access Transmission Services LLC212.7%
United States Cellular - CA192.4%
Ip Horizon LLC172.2%

Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.

Local calling areas in 707

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 707 has codes in 75 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

Rate centers in area code 707 by assigned codes
Rate center (NANPA)PlaceCodes
SANTA ROSASanta Rosa, CA144
FRFLD-SUISnot matched56
VALLEJOVallejo, CA50
NAPANapa, CA43
VACAVILLEVacaville, CA37
EUREKAEureka, CA36
PTLM MAINnot matched29
UKIAHUkiah, CA22
BENICIABenicia, CA21
SONOMASonoma, CA16
ST HELENASt. Helena, CA12
PTLM SWIFTnot matched12
LAKEPORTLakeport, CA11
YOUNTVILLEYountville, CA10
WINDSORWindsor, CA10
LOWER LAKEnot matched10
FORT BRAGGFort Bragg, CA10
ARCATAArcata, CA10
SEBASTOPOLSebastopol, CA9
DIXONDixon, CA8
CRESCENTCYCrescent City, CA8
WILLITSWillits, CA8
HEALDSBURGHealdsburg, CA8
GARBERVLnot matched6
KELSEYVLnot matched6

Top 25 of 75 rate centers.

How full is area code 707?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 785 are assigned in 707, 98% of 800. 52 were assigned in 2020 or later.

Area code 707: central office codes by decade assigned
Decade assignedExchangesShare
2000s5326%
2010s9648%
2020s5226%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

Getting a 707 number for your business

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

If you already have a number in area code 707, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

Frequently asked questions

Where is area code 707?

707 is a geographic area code in California. Places with the most assigned exchanges include Santa Rosa, Vallejo, Napa, and Vacaville.

What time zone is area code 707 in?

NANPA lists 707 in the Pacific time zone.

When did area code 707 go into service?

NANPA records an in-service date of January 1, 1959.

Is 707 an overlay area code?

Yes. It shares its territory with 369.

Can my business get a 707 phone number?

Callata includes up to 3 local numbers on its $99/month plan (5 users included). Which 707 numbers are open depends on carrier inventory when you choose, and you can port an existing number for free.