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5 Best Internet Providers in 91321, CA

Find internet availability by address in 91321, CA

Jump to: Best Internet Provider | Availability Maps | Customer Reviews | 91321 ISP Report Card | Business Internet in 91321

91321 ISP Report at a Glance
ISP grade 91321 ISP Report Card C+
Average speed Download Speed for Most Households 1,140 Mbps
ISP count Number of Internet Service Providers 5
Customer review count Real 91321 Customer Ratings 0

This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.

Data update information

This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.

91321 has 5 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Fiber, Cable, DSL, and Fixed Wireless internet are available in the zip. Reviews are grouped by provider and the type of service they offer, covering all 4 available internet technologies in 91321.

91321 overview

91321 has 5 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Fiber, Cable, DSL, and Fixed Wireless internet are available in the zip. Reviews are grouped by provider and the type of service they offer, covering all 4 available internet technologies in 91321.

Compare Providers Ranked by Coverage, Speed, and Customer Ratings

Spectrum

Spectrum logo

Availability:

99.4%

Customer Rating:

3.3 of 5 stars

(1,936)

View Plans

1-877-411-1381 Price: $30.00 - $120.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in 91321.

Max Download Speed InfoCalculated from the maximum speeds available to most 91321 residents, weighted by user distribution.

Customer Rating

Fiber

6.1%

1,000 Mbps

1,000 Mbps

Fiber: 3.5 of 5 stars

(203)

Cable

99.4%

1,000 Mbps

1,000 Mbps

Cable: 3.2 of 5 stars

(1,618)

EarthLink

EarthLink logo

Availability:

96.2%

Customer Rating:

3.8 of 5 stars

(13)

View Plans

1-877-418-2092 Price: Starting at $54.95 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in 91321.

Max Download Speed InfoCalculated from the maximum speeds available to most 91321 residents, weighted by user distribution.

Customer Rating

Fiber

14.9%

1,949 Mbps

5,000 Mbps

Fiber: 4.2 of 5 stars

(5)

DSL

95.0%

86 Mbps

100 Mbps

DSL: 3.8 of 5 stars

(4)

Fixed Wireless

77.5%

31 Mbps

100 Mbps

Wireless: 0.0 of 5 stars

(0)

AT&T

AT&T logo

Availability:

96.2%

Customer Rating:

3.7 of 5 stars

(1,051)

View Plans

1-877-610-1219 Price: $65.00 - $90.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in 91321.

Max Download Speed InfoCalculated from the maximum speeds available to most 91321 residents, weighted by user distribution.

Customer Rating

Fiber

14.9%

1,949 Mbps

5,000 Mbps

Fiber: 3.9 of 5 stars

(544)

DSL

95.0%

86 Mbps

100 Mbps

DSL: 3.3 of 5 stars

(304)

Fixed Wireless

77.5%

31 Mbps

100 Mbps

Wireless: 3.6 of 5 stars

(164)

T-Mobile Home Internet

T-Mobile Home Internet logo

Availability:

89.3%

Customer Rating:

4.0 of 5 stars

(341)

View Plans

1-833-601-2935 Price: $55.00 - $105.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in 91321.

Max Download Speed InfoCalculated from the maximum speeds available to most 91321 residents, weighted by user distribution.

Customer Rating

Fixed Wireless

89.3%

61 Mbps

100 Mbps

Wireless: 3.9 of 5 stars

(204)

Above are the top 4 providers in 91321, CA for most people based on high speed internet coverage, speeds, and customer reviews. Click below to see all providers in your zip.


Verizon

Verizon logo

Availability:

87.2%

Customer Rating:

3.8 of 5 stars

(811)

View Plans

1-833-213-7018 Price: $49.99 - $89.99 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in 91321.

Max Download Speed InfoCalculated from the maximum speeds available to most 91321 residents, weighted by user distribution.

Customer Rating

Fixed Wireless

87.2%

300 Mbps

300 Mbps

Wireless: 3.7 of 5 stars

(170)

Providers with less than 1% coverage in this zip are excluded from the list. To see if one of these providers is available at your home, please use the address search above.

Satellite providers, which generally offer 100% coverage across the United States, are available for 91321 residents as well. Some of the top satellite options include Dish Network, DirecTV, HughesNet, Viasat, and Starlink. These providers offer varied services and pricing, giving residents flexibility in choosing the best option for their location and needs.

Dish

Dish logo

Availability:

100%

Customer Rating:

3.6923 of 5 stars

(13)

View Plans

1-866-252-1910 Price: {{isp_price_range}}


DirecTV

DirecTV logo

Availability:

100%

Customer Rating:

4.3333 of 5 stars

(9)

View Plans

1-844-294-9501 Price: {{isp_price_range}}


Viasat

Viasat logo

Availability:

100%

Customer Rating:

1.7273 of 5 stars

(11)

View Plans

1-833-875-1370 Price: {{isp_price_range}}


HughesNet

HughesNet logo

Availability:

100%

Customer Rating:

2.4286 of 5 stars

(21)

View Plans

1-833-684-9249 Price: {{isp_price_range}}


Starlink

Starlink logo

Availability:

100%

Customer Rating:

3.9836 of 5 stars

(61)

View Plans

Price: {{isp_price_range}}

Speed and technology may vary by address for all providers. Please note we may have a financial relationship with some of the providers above, which does not impact the customer ratings displayed. Customer ratings listed above are national ratings, local 91321 ratings may vary and are shown below.

Who is the Best Internet Provider in 91321, CA?

T-Mobile Home Internet is the highest-rated internet provider in 91321 based on 360 California customer reviews, and T-Mobile Home Internet has the highest rating nationwide. The provider information above and the information immediately below can help you decide. Compare provider ratings and review counts above. The chart and table below show average customer ratings from customers in 91321, California, and customers throughout the country.

Top Rated Internet Providers in 91321


T-Mobile Home Internet4.004.04
Verizon3.713.82
AT&T3.293.66
Spectrum3.253.28
  • City Rating
  • State Rating
  • National Rating

Local, State, and National Ratings for all 91321 Internet Providers

ISP / Tech Type91321 OverallCalifornia OverallNational OverallFor Service
T-Mobile Home Internet (0) (22) (284)View Plans
Verizon (0) (24) (723)View Plans
AT&T (0) (107) (924)View Plans
Spectrum (0) (203) (1738)View Plans
HughesNet (0) (1) (18)View Plans
Viasat (0) (1) (11)View Plans
EarthLink (0) (2) (12)View Plans

Based on 360 reviews from California internet customers, T-Mobile Home Internet is the best internet service provider for 91321 residents. T-Mobile Home Internet was rated at an average of 4.00 out of 5 in our report for overall customer satisfaction. Verizon wins for second-place in California, with 3.71 out of 5 stars and 87.2% coverage in 91321.

At a national level, based on 3710 national reviews for any of the providers listed above, T-Mobile Home Internet is rated higher than any other provider, with a rating of 4.04 out of 5.

Which Providers are Available at my Home in 91321?

The map shows speeds per provider and where each provider is available. Click the drop-down menu to choose
a different provider.

91321, CA map of internet availability

Internet Availability Key

0%
10%
50%
100%

 

Speeds and coverage vary within the zip, and sometimes even from block to block. The map shows speeds per provider and where each provider is available.

Who is the Fastest Internet Provider in 91321?

According to unbiased feedback from real internet customers in the zip, they reported being happiest with speeds provided by Verizon. On the other hand, based on data provided by the internet providers to the FCC, Spectrum should have faster speeds at a local level. While we typically put more weight on real-world customer ratings, we display both satisfaction and technical maximum information for customers to decide for themselves.

Data Reported to FCC by ISPs: Average Maximum Available in 91321

Max Advertised Speed in 91321, CA


ISP / Tech TypeMax Advertised Speed
EarthLink5,000 Mbps
AT&T5,000 Mbps
Spectrum1,000 Mbps
Verizon300 Mbps
T-Mobile Home Internet100 Mbps
Viasat100 Mbps
HughesNet25 Mbps

Customer Ratings for Internet Provider Speeds in 91321


Verizon3.834.00
T-Mobile Home Internet3.823.96
Spectrum3.523.61
AT&T3.223.75
  • City Rating
  • State Rating
  • National Rating

ISP / Tech Type91321 SpeedCalifornia SpeedNational SpeedFor Service
Verizon (0) (24) (723)View Plans
T-Mobile Home Internet (0) (22) (284)View Plans
Spectrum (0) (203) (1738)View Plans
AT&T (0) (107) (924)View Plans
HughesNet (0) (1) (18)View Plans
Viasat (0) (1) (11)View Plans
EarthLink (0) (2) (12)View Plans

Based on data reported by 91321 ISPs to the FCC, the fastest speeds in the zip are available through Spectrum. The company offers speeds up to 5,000 Mbps in 91321. Therefore, the average customer can get up to 1,000 Mbps if they're willing to purchase the fastest subscription tier available at their homes.

Additionally, actual customers in the zip rated their satisfaction with internet speed highest with Verizon. This indicates Verizon reliably delivers speeds expected by the customer based on the plan they are paying for.

Who is the Cheapest Internet Provider in 91321?

California customers rate T-Mobile Home Internet as the cheapest internet service provider in state. Data comes from customers in the state rating their satisfaction with pricing. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.

T-Mobile Home Internet received a local rating of 4.18 out of 5, which is about average for the average across all internet providers in the country. Verizon is rated in second place for affordability by the company’s 91321 customers with an average price rating of 3.75 out of 5.

The chart and graph below show how customers in 91321, California, and the United States rated the affordability of their internet service.

Rated Affordability in 91321


T-Mobile Home Internet4.184.11
Verizon3.753.50
AT&T3.213.51
Viasat3.001.46
  • City Rating
  • State Rating
  • National Rating

ISP / Tech Type91321 AffordabilityCalifornia AffordabilityNational AffordabilityFor Service
T-Mobile Home Internet (0) (22) (284)View Plans
Verizon (0) (24) (723)View Plans
AT&T (0) (107) (924)View Plans
HughesNet (0) (1) (18)View Plans
Viasat (0) (1) (11)View Plans
Spectrum (0) (203) (1738)View Plans
EarthLink (0) (2) (12)View Plans

91321 Internet Health Assessment

ISP Reports evaluates the technological infrastructure across the United States. This includes assessing a grade for ISP providers and infrastructure in the zip and setting an index number for the digital connectivity of its residents. You can view the ISP Report Card and the Digital Connectivity Index for 91321 below, including the metrics used and how 91321 compares to the rest of California and nation.

91321 ISP Report Card: C+
Metric

(hover for details)
91321 California USA
18.33% 56.12% 67.25%
1,140 Mbps 3,631 Mbps 3,293 Mbps
6.6 7.4 6.8

 

91321 Digital Connectivity Index: 83 / 100
Metric

(hover for details)
91321 California USA
3.2 3.0 2.7
12% 15% 14%
97% 96% 95%
94% 93% 90%
82% 78% 75%
82% 79% 76%

Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.

91321 ISP Report Card & Digital Connectivity Index

The ISP Report Card in 91321 is C+, which is much better than other zip codes. The local demand for broadband internet connectivity in 91321 is high with a score of 83 / 100 in our Digital Connectivity Index. This means that internet service providers operating in 91321 have done a great job meeting the needs of its residents.

The 91321 ISP Report Card evaluates the zip on availability and speed metrics compared to other zip codes in the United States. ISP Infrastructure can vary greatly and on its own isn’t a perfect measure of what a zip needs. Please see our ISP Report Card along with the Digital Connectivity Index above to evaluate how well the connectivity demand is met by the existing infrastructure.

94% of 91321 households have an internet connection despite having 99.63% availability. 82% of households have fiber, cable, or DSL, 7% have satellite, 0% are still on dial-up, and 1% of households have internet but don’t pay for a subscription because it’s subsidized by the Affordable Connectivity Program.

As you can see in the table above, while 82% of households have a broadband connection such as fiber, cable or DSL available to their home, 82% subscribe to it. A very large amount of 91321 residents are taking advantage of the available internet infrastructure.

For more details, please visit our ISP Report Card and Digital Connectivity Index pages.

How do Neighboring Zip Codes Compare to 91321?

91355, CA

  • ISP Report Card: C+
  • Digital Connectivity Index: 76 / 100
91351, CA

  • ISP Report Card: C+
  • Digital Connectivity Index: 84 / 100
91381, CA

  • ISP Report Card: B
  • Digital Connectivity Index: 96 / 100
91350, CA

  • ISP Report Card: B-
  • Digital Connectivity Index: 92 / 100
91354, CA

  • ISP Report Card: B-
  • Digital Connectivity Index: 94 / 100
91387, CA

  • ISP Report Card: C+
  • Digital Connectivity Index: 88 / 100
91342, CA

  • ISP Report Card: B
  • Digital Connectivity Index: 79 / 100
91344, CA

  • ISP Report Card: B
  • Digital Connectivity Index: 84 / 100
91326, CA

  • ISP Report Card: C+
  • Digital Connectivity Index: 92 / 100

How Much Speed does a 91321 Household Need?

Higher speed is typically preferred, but that comes at a higher price. The average size of a household in 91321 is 3.2, which is larger than the California average of 3.0 and larger than the national average of 2.7. 91321's average household income is $105,120 which is higher than the California average of $108,618 and much higher than the national average of $90,606. Homes with more people living in them and with higher incomes tend to indicate more devices being used more often.

91321 also has 19% of its population enrolled in school between the 6th grade and college level, this is higher than the California average of 17%. Additionally, 12% of residents work from home, which is lower than the 15% of residents in California who work from home. This and other factors you can see above show us that the community of 91321 has a very high need for internet connectivity and speeds.

Compared to the rest of the country, 91321 households are more technology-engaged. 97% of households have some sort of computing device, 88% have desktops or laptops in the home, and 95% have smartphones. To see what speeds you are currently getting, please visit our internet speed test tool.

Which Fiber Internet Providers are Available in 91321?

EarthLink Fiber in 91321, CA

EarthLink logo

Availability:

14.9%

Customer Rating:

4.2 of 5 stars

(5)

Avg. Download Speed

1,949 Mbps

EarthLink offers Fiber service to 14.9% of 91321 homes. Across the zip, EarthLink Fiber has speeds up to 1,949 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for EarthLink Fiber. EarthLink Fiber is rated about the same as other types of internet service available in 91321 from EarthLink in terms of customer satisfaction.

AT&T Fiber in 91321, CA

AT&T logo

Availability:

14.9%

Customer Rating:

3.9 of 5 stars

(544)

Avg. Download Speed

1,949 Mbps

AT&T offers Fiber service to 14.9% of 91321 homes. Across the zip, AT&T Fiber has speeds up to 1,949 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for AT&T Fiber. AT&T Fiber is rated higher than other types of internet service available in 91321 from AT&T in terms of customer satisfaction.

Spectrum Fiber in 91321, CA

Spectrum logo

Availability:

6.1%

Customer Rating:

3.5 of 5 stars

(203)

Avg. Download Speed

1,000 Mbps

Spectrum offers Fiber service to 6.1% of 91321 homes. Across the zip, Spectrum Fiber has speeds up to 1,000 Mbps, with speeds from 1,000 Mpbs up to 1,000 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 500 and as high as 500, with an average of 500 Mbps throughout the zip. Spectrum Fiber is rated about the same as other types of internet service available in 91321 from Spectrum in terms of customer satisfaction.

Which Cable Internet Providers are Available in 91321?

Spectrum Cable in 91321, CA

Spectrum logo

Availability:

99.4%

Customer Rating:

3.2 of 5 stars

(1,618)

Avg. Download Speed

1,000 Mbps

Spectrum offers Cable service to 99.4% of 91321 homes. Across the zip, Spectrum Cable has speeds up to 1,000 Mbps, with speeds from 1,000 Mpbs up to 1,000 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 35 and as high as 35, with an average of 35 Mbps throughout the zip. Spectrum Cable is rated lower than other types of internet service available in 91321 from Spectrum in terms of customer satisfaction.

Which DSL Internet Providers are Available in 91321?

EarthLink DSL in 91321, CA

EarthLink logo

Availability:

95.0%

Customer Rating:

3.8 of 5 stars

(4)

Avg. Download Speed

86 Mbps

EarthLink offers DSL service to 95.0% of 91321 homes. Across the zip, EarthLink DSL has speeds up to 86 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 18 Mbps throughout the zip. EarthLink DSL is rated the same as other types of internet service available in 91321 from EarthLink in terms of customer satisfaction.

AT&T DSL in 91321, CA

AT&T logo

Availability:

95.0%

Customer Rating:

3.3 of 5 stars

(304)

Avg. Download Speed

86 Mbps

AT&T offers DSL service to 95.0% of 91321 homes. Across the zip, AT&T DSL has speeds up to 86 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 18 Mbps throughout the zip. AT&T DSL is rated about the same as other types of internet service available in 91321 from AT&T in terms of customer satisfaction.

Which Fixed Wireless and LTE Internet Providers are Available in 91321?

T-Mobile Home Internet Fixed Wireless in 91321, CA

T-Mobile Home Internet logo

Availability:

89.3%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

61 Mbps

T-Mobile Home Internet offers Fixed Wireless service to 89.3% of 91321 homes. Across the zip, T-Mobile Home Internet Fixed Wireless is the only type of service available from the company, with speeds up to 61 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 11 Mbps throughout the zip. T-Mobile Home Internet Fixed Wireless is rated other types of internet service available in 91321 from T-Mobile Home Internet in terms of customer satisfaction.

Verizon Fixed Wireless in 91321, CA

Verizon logo

Availability:

87.2%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

300 Mbps

Verizon offers Fixed Wireless service to 87.2% of 91321 homes. Across the zip, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps, with speeds from 300 Mpbs up to 300 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 20 and as high as 20, with an average of 20 Mbps throughout the zip. Verizon Fixed Wireless is rated other types of internet service available in 91321 from Verizon in terms of customer satisfaction.

EarthLink Fixed Wireless in 91321, CA

EarthLink logo

Availability:

77.5%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

31 Mbps

EarthLink offers Fixed Wireless service to 77.5% of 91321 homes. Across the zip, EarthLink Fixed Wireless has speeds up to 31 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 4.4 Mbps throughout the zip. EarthLink Fixed Wireless is rated other types of internet service available in 91321 from EarthLink in terms of customer satisfaction.

AT&T Fixed Wireless in 91321, CA

AT&T logo

Availability:

77.5%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

31 Mbps

AT&T offers Fixed Wireless service to 77.5% of 91321 homes. Across the zip, AT&T Fixed Wireless has speeds up to 31 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 4.4 Mbps throughout the zip. AT&T Fixed Wireless is rated other types of internet service available in 91321 from AT&T in terms of customer satisfaction.

Which ISP Should You Choose in 91321?

The right ISP for you depends upon your needs, but in general we can make the following suggestions:

  • The best all-around internet service provider in 91321 is T-Mobile Home Internet.
  • The fastest internet provider should be Spectrum. Considering speed for the money and reliability in speeds, Verizon may be a better choice based on real-world local customer feedback.
  • The most affordable internet provider in 91321 is T-Mobile Home Internet.
  • Viasat, Spectrum, and HughesNet has the broadest coverage in 91321, and is most likely to cover your home. To find out exactly what's available at your home, please use our address search tool.

How does 91321 compare to other cities with a similar population?

To see how 91321 stacks up on the national level, it's useful to look at some other cities with similarly sized populations. Below you can see a list of these cities and how they compare to 91321's C+ ISP Report Card and 83 / 100 Digital Connectivity Index.

07208, NJ

  • ISP Report Card: A
  • Digital Connectivity Index: 65 / 100
22306, VA

  • ISP Report Card: B
  • Digital Connectivity Index: 79 / 100
30094, GA

  • ISP Report Card: A
  • Digital Connectivity Index: 82 / 100
91007, CA

  • ISP Report Card: B-
  • Digital Connectivity Index: 84 / 100
48642, MI

  • ISP Report Card: C
  • Digital Connectivity Index: 62 / 100
00783, PR

  • ISP Report Card: B+
  • Digital Connectivity Index: 23 / 100
56301, MN

  • ISP Report Card: B-
  • Digital Connectivity Index: 69 / 100
60302, IL

  • ISP Report Card: A-
  • Digital Connectivity Index: 75 / 100
75224, TX

  • ISP Report Card: B+
  • Digital Connectivity Index: 46 / 100

Customer Reviews

Customer Reviews for Internet Service Providers in California

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