Phoenix, AZ · Cox terms checked October 22, 2026
Cox data cap in Phoenix, AZ
Edited by John VollData checked
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 Phoenix say about it
From December 11, 2024 to September 28, 2026, 112 posts and comments in 22 threads on r/phoenix discussed Cox's data cap. This is our summary of them.
- The complaint that comes up most is the allowance itself. People describe overage charges after a month of heavy streaming, gaming or working from home, and several paid each month for unlimited data to avoid them.
- Not everyone hits it. A number of people say their household never came close, so it matters most for large or heavy-use households.
- Several people say Cox offered unlimited data, a faster plan or a lower bill when they called to cancel, or once a fiber provider started building in their neighborhood. Others were offered more speed but kept the cap.
- People who left name T-Mobile Home Internet, Verizon 5G Home Internet, AT&T Internet and Quantum Fiber, and list no data cap among their reasons.
- After the Spectrum switch in August and September, reports were mixed: some saw unlimited data included on Spectrum-branded plans, while others still saw the same allowance in the fine print of a new plan.
Threads with the most discussion of the cap
- r/phoenix thread, December 20, 2025, 143 comments, 31 of them about the data cap
- r/phoenix thread, July 5, 2026, 218 comments, 13 of them about the data cap
- r/phoenix thread, June 11, 2026, 77 comments, 12 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 Phoenix
The FCC data lists 2 other wired and 6 fixed wireless providers in Phoenix. Coverage is a share of the city, not a promise at your address.
Wired: fiber, cable and DSL (2)
| Provider | Network here | Coverage | Top advertised speed | Data on its broadband labels | Plans |
|---|---|---|---|---|---|
| CenturyLink | DSL (copper) | 73.3% of served locations * | 140 Mbps down, 100 Mbps up | No broadband label data on file | Check plans on the CenturyLink site |
| Quantum Fiber | Fiber | 16.4% of served locations * | 8,000 Mbps down, 8,000 Mbps up | No broadband label data on file | Check plans on the Quantum Fiber site |
Fixed wireless, including 5G home internet (6)
Fixed wireless depends on the signal at your address, so availability and speed vary from home to home.
| Provider | Network here | Coverage | Top advertised speed | Data on its broadband labels | Plans |
|---|---|---|---|---|---|
| Tristate Wi-Fi by Wi-Fiber | Fixed wireless | 77.4% of homes | Not reported | No broadband label data on file | No link on file |
| T-Mobile Home Internet | Fixed wireless | 69.5% 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 |
| AT&T Internet | Fixed wireless | 56.1% 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 |
| Verizon 5G Home Internet | Fixed wireless | 54.5% of homes | 1,000 Mbps down, 75 Mbps up | No broadband label data on file | Check plans on the Verizon 5G Home Internet site |
| AirFiber WISP | Fixed wireless | 54.4% of homes | 1,000 Mbps down, 500 Mbps up | No broadband label data on file | No link on file |
| GeoLinks | Fixed wireless | 8.3% of homes | 1,000 Mbps down, 1,000 Mbps up | No broadband label data on file | No link on file |
* Share of the locations (buildings) this brand serves, not a share of homes. Some carriers sell a different brand for each technology, and each brand has its own row.
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 Phoenix, AZ with plans, prices and satellite options.
Questions
Does Cox have a data cap in Phoenix?
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 Phoenix?
Besides Cox, the FCC data lists these providers in Phoenix (wired: CenturyLink and Quantum Fiber; fixed wireless: Tristate Wi-Fi by Wi-Fiber, T-Mobile Home Internet, AT&T Internet, Verizon 5G Home Internet, AirFiber WISP and GeoLinks). 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.