Cox vs. CenturyLink
These two genuinely overlap in several large metros, which makes this one of the few CenturyLink comparisons you will actually have to make.
Cox cable is the stronger download performer and reaches far more addresses in the metros where both operate. CenturyLink wins where it has built fiber, on uploads and on flat pricing. If CenturyLink only offers DSL at your address, Cox is the clear pick.
- Cox is now part of Charter: the deal closed Aug 20, 2026, and Cox areas are moving to Spectrum branding and pricing. See our Spectrum review.
- Quantum Fiber, CenturyLink's fiber brand, is now AT&T (Feb 2, 2026). CenturyLink copper stays with Lumen.
Where these two actually meet
Unlike most CenturyLink matchups, this one comes up constantly, because Cox and CenturyLink overlap across several large western and southern metros — Phoenix and Tucson, Las Vegas, Omaha, Wichita and New Orleans among them. In those cities the two are often the only wired options on the list.
Our own coverage data shows how lopsided the reach can be. Across the Arizona cities we track, cable coverage sits far above fiber coverage, and Cox is frequently the provider filing the widest availability in a given town. That asymmetry is the backdrop to this whole comparison.
Where Cox wins
Availability and download speed. In the metros it serves, Cox cable typically reaches the overwhelming majority of homes, including plenty of neighbourhoods where CenturyLink has never built fiber. Its download tiers run high enough to satisfy almost any household.
For a download-heavy home — streaming, browsing, gaming as a player rather than a broadcaster — Cox is very often the practical answer, simply because it is there and it is fast.
Where CenturyLink wins
On fiber, CenturyLink takes the fundamentals: symmetrical uploads, no data cap, and a flat rate that does not step up when a promotion expires. Legacy Cox plans carried a data allowance, but the Spectrum plans now sold in former Cox areas have no cap and lock the price for up to two years with a bundle.
If you work from home, upload video, or run cloud backups, symmetrical fiber is worth paying for. If you have been burned by a bill that jumped in month thirteen, the flat rate is worth something too.
The asymmetry you should expect
Be realistic about the odds. In the shared metros, the chance that Cox reaches your address is high; the chance that CenturyLink fiber reaches it is considerably lower. Phoenix is a good example — cable coverage across the city is broad, while fiber reaches a much smaller share of homes.
This means the decision often resolves itself before you make it. Check the address first and you may find there is only one wired option, in which case the comparison becomes Cox against 5G home internet instead.
Which should you get?
Where CenturyLink fiber is available, take it: better uploads, no cap, flatter pricing. Where CenturyLink has only DSL, take Cox, which will be faster and more reliable by a wide margin.
Where only Cox reaches you, compare it against 5G home internet rather than against CenturyLink, and price it as Spectrum, which is what new customers in Cox areas now buy.
What changed in 2026
Which CenturyLink you're comparing
How the choice looks now
- If AT&T Fiber (former Quantum) reaches you, it usually beats cable on upload speed. AT&T Fiber: 300 Mbps $50/mo, 500 Mbps $65, 1 Gig $80, 5 Gig $125, with the $10 AutoPay and paperless discount, plus taxes. No data cap, no annual contract. Online orders of 1 Gig or 5 Gig get a $100 reward card.
- If CenturyLink can only offer DSL, Cox/Spectrum cable will usually be much faster.
- Former Cox customers: Spectrum promo prices last 1 year, so compare the standard rate too. Spectrum review
Sources (2)
- Plan pages and Broadband Facts labels from Cox, Spectrum, AT&T Fiber, checked Oct 2026
- Company press releases and regulatory filings on the ownership changes mentioned
Prices and offers change often; confirm at your address before you order. How we research
Questions
Is Cox now Spectrum?
Yes. Charter, which runs Spectrum, completed its purchase of Cox on Aug 20, 2026, and Cox areas are moving to Spectrum branding and pricing.
Is Cox or CenturyLink better?
Where CenturyLink means fiber (now AT&T Fiber), fiber usually wins on upload speed and has no data cap. Where CenturyLink means DSL, Cox/Spectrum cable is usually faster.
Jean founded ShopHighSpeed after trying to find one straight answer about business internet in his own town. He has been a Comcast and Verizon Fios customer, and ranks providers on what they actually deliver, not on what they advertise.