San Diego, CA · Cox terms checked October 22, 2026

Cox data cap in San Diego, CA

The FCC data lists Cox, which now sells service under the Spectrum name, at 48.7% of homes in San Diego. Cox plans have come with a 1.25 TB monthly data allowance. Here is what Cox's own pages say, what changed with the Spectrum deal, what people on r/sandiego report, and the other providers the FCC data lists in San Diego.

Edited by John VollData checked October 22, 2026

The data cap, in Cox's own words

Cox's data usage page says its residential internet plans include 1.25 TB (1,280 GB) of data a month, counting both downloads and uploads. The allowance resets with each monthly usage cycle, which runs on different dates from the bill.

The first time a household goes over, Cox applies a one-time courtesy credit for that cycle. After that it adds 50 GB blocks at $10 each, up to $100 in overage charges a month. Cox sells an Unlimited plan and a 500 GB Additional Data Plan for an additional monthly charge; its page does not list those prices.

ConnectAssist, Cox's low-income tier, also includes 1.25 TB, and Cox says it carries no data overage charges.

Source: Cox: How you can use your data, read on October 22, 2026. Cox can change these terms; your bill and account show the ones on your plan.

Cox's FCC broadband labels, in the last copy of its label file we hold (collected September 7, 2026): 9 of its 41 label plans list 1,280 GB a month; the rest do not state one.

What changed with Spectrum

Charter, the company behind Spectrum, closed its purchase of Cox in August 2026 and said it would bring Spectrum pricing and packaging to the Cox footprint by mid-September (Light Reading).

Cox's site now carries the Spectrum brand, and its page on adding data says that when you connect to Spectrum Internet, unlimited data is included, with no data caps or overage fees (cox.com).

Existing plans did not switch over on their own. A Spectrum spokesperson told Arizona customers that legacy Cox customers would see no changes to their current bills, products or services unless they chose to make changes (azfamily). Cox's data usage page still describes the allowance above, so a plan started with Cox can keep it until you change plans.

What people in San Diego say about it

From September 14, 2025 to September 23, 2026, 29 posts and comments in 5 threads on r/sandiego discussed Cox's data cap. This is our summary of them.

The allowance and the monthly charge for unlimited data are the main complaints, and some say the cap is the reason they want to leave.
Cox's low-income plan comes up as an option without data overage charges.
The busiest thread, in late September after the Spectrum switch, asked whether the caps were gone. Some said they called and moved to a Spectrum-branded plan with unlimited data included, sometimes for less; others said their existing plan still had the cap, and some kept getting data usage warnings.
Alternatives people named include AT&T Internet fiber where it reaches, and Verizon 5G Home Internet and T-Mobile Home Internet for home 5G, with mixed reports on the wireless options.

Threads with the most discussion of the cap

r/sandiego thread, September 22, 2026, 73 comments, 13 of them about the data cap
r/sandiego thread, May 9, 2026, 31 comments, 7 of them about the data cap
r/sandiego thread, September 17, 2026, 41 comments, 4 of them about the data cap

Reddit users are anonymous and are not a sample of all residents; what one person reports about a price or an offer may not apply to you. How we count.

Alternatives to Cox in San Diego

The FCC data lists 2 other wired and 5 fixed wireless providers in San Diego. Coverage is a share of the city, not a promise at your address.

Wired: fiber, cable and DSL (2)

Wired internet providers in San Diego other than Cox
Provider	Network here	Coverage	Top advertised speed	Data on its broadband labels	Plans
AT&T Internet	Fiber	84.9% of homes	5,000 Mbps down, 5,000 Mbps up	Unlimited data on 48 of its 81 label plans; 33 list 1,500 GB a month	Check plans on the AT&T Internet site
Spectrum	Cable	46.1% of homes	1,000 Mbps down, 1,000 Mbps up	Its broadband labels do not state a data allowance	Check plans on the Spectrum site

Fixed wireless, including 5G home internet (5)

Fixed wireless depends on the signal at your address, so availability and speed vary from home to home.

Fixed wireless internet providers in San Diego
Provider	Network here	Coverage	Top advertised speed	Data on its broadband labels	Plans
T-Mobile Home Internet	Fixed wireless	71% of homes	100 Mbps down, 20 Mbps up	Unlimited data on 17 of its 19 label plans; 2 list 100 GB and 150 GB a month	Check plans on the T-Mobile Home Internet site
Verizon 5G Home Internet	Fixed wireless	57.7% of homes	1,000 Mbps down, 75 Mbps up	No broadband label data on file	Check plans on the Verizon 5G Home Internet site
San Diego Broadband	Fixed wireless	18.7% of homes	500 Mbps down, 100 Mbps up	No broadband label data on file	No link on file
GeoLinks	Fixed wireless	9.1% of homes	1,000 Mbps down, 1,000 Mbps up	No broadband label data on file	No link on file
GFiber	Fixed wireless	4.1% of homes	1,000 Mbps down, 1,000 Mbps up	Unlimited data on all 18 of its label plans	Check plans on the GFiber site

The data column summarizes every plan in the provider's FCC broadband label files as we last collected them. A plan's own label is the one that applies to you; read it before you order. Satellite services are left out here and listed on the city page.

Check your address on the FCC map, or see all internet providers in San Diego, CA with plans, prices and satellite options.

Questions

Does Cox have a data cap in San Diego?

Cox's data usage page says its residential plans include 1.25 TB (1,280 GB) of data a month. Since Charter's purchase of Cox, cox.com says Spectrum Internet plans include unlimited data with no data caps or overage fees, while existing Cox plans continue unchanged unless you change them. Which terms apply depends on your plan.

What does Cox charge for going over the data cap?

After a one-time courtesy credit the first time you go over, Cox adds 50 GB blocks at $10 each, up to $100 in overage charges a month, according to its data usage page.

Which other internet providers serve San Diego?

Besides Cox, the FCC data lists these providers in San Diego (wired: AT&T Internet and Spectrum; fixed wireless: T-Mobile Home Internet, Verizon 5G Home Internet, San Diego Broadband, GeoLinks and GFiber). Coverage varies by address, so check yours on the FCC map.

More on the Cox data cap

Source: FCC National Broadband Map, Broadband Data Collection, availability as of December 31, 2025 (published September 29, 2026). Providers report where they offer service; a listed provider may not serve every address. Advertised speeds are not measured speeds. Check a specific address on the address check page. How we build these pages.