Denver, Colorado · Denver County
Internet Providers in Denver, CO: Compare Xfinity, Quantum Fiber & 5G Home
Xfinity dominates the cable footprint. Quantum Fiber (formerly CenturyLink, now rebranded) covers a portion of the city with true fiber. T-Mobile 5G fills the rest. For most addresses it comes down to two providers, sometimes one.
Here is what is available at your specific building, what the first bill includes, and how to pick without regretting it in month thirteen.
Sam here. Denver's population has grown faster than its infrastructure in the last decade. The gap between what the provider maps show and what you can actually order is wider here than in most comparable metros. Check your address before committing.
📍 Check what actually reaches your Denver address
Coverage varies street by street in Denver. Check your building, not just your ZIP code.
No sign-up. Or call: (978) 723-5746
The three that stand out in Denver
No installation, ships in days, month to month. Good bridge while a wired installation is pending. Denver's altitude does not affect 5G, but tower proximity matters for consistent speed.
Test within the return window. Evening peak congestion is the main variable.
Widest wired footprint in the metro. Competitive promotional pricing. The reliable baseline across most of Denver. Upload is the constraint on cable — a technology limit regardless of tier.
Where Quantum Fiber reaches your address, compare both. Fiber wins on upload; cable wins on breadth.
CenturyLink's fiber successor brand in Colorado. Symmetrical upload, competitive pricing, price-lock on some plans. Footprint is smaller than Xfinity but where it lands, it is usually the better two-year value.
Confirm the plan is fiber and not the legacy DSL copper still present on some Denver addresses.
Every Denver option — narrowed to what fits
Showing all options
Formerly CenturyLink. Symmetrical upload on all plans. Smaller footprint than Xfinity but the better year-two value where it lands. Confirm fiber vs DSL at your address.
Symmetrical upload on all plansWidest coverage in Denver. The reliable fallback almost everywhere. Watch the month-13 standard rate.
Ships in days. No contract. Use the return window to test speeds before committing.
Try widening one — or call Sam on (978) 723-5746.
The Quantum Fiber brand is not widely known, but it is running on real fiber infrastructure in parts of Denver. If it reaches your address, the year-two pricing comparison is almost always in its favour versus Xfinity once the promo expires.
Why our list is short
Three options, not twelve
Providers we left out — and why
Satellite
Reseller
Satellite
Speed ladder — where real usage lands
Light use — email, music, one SD stream. Not suitable for a working household.
Upload too low for video calls4K streaming, two people working, gaming. Where most Denver households land in practice.
Symmetrical fiber here beats gigabit cable for remote workAnything simultaneously. Usually overkill unless you have a large active household.
Buy for upload, not downloadThree questions Denver residents ask
What is Quantum Fiber and is it related to CenturyLink?
Yes — Quantum Fiber is CenturyLink's rebranded residential fiber service. Lumen Technologies (the parent company) rebranded its consumer fiber division as Quantum Fiber. It is the same infrastructure, now being actively upgraded and expanded in markets including Denver. If you had CenturyLink internet in Denver, the company is now Quantum Fiber.
What is the cheapest internet in Denver?
Xfinity at ~$30 intro is the lowest advertised wired rate. Quantum Fiber entry is around $35. T-Mobile 5G Home at $50 is flat-rate with no promo step-up. Over two years, T-Mobile often competes with Xfinity's real cost once the standard rate kicks in.
What is the best internet in Denver overall?
Quantum Fiber where it reaches for symmetrical upload and better year-two pricing. Xfinity as the widest-coverage fallback. T-Mobile 5G for no-contract flexibility or while waiting on a wired install.
What the bill actually looks like
First-bill breakdown
Coverage across Denver
Denver, neighbourhood by neighbourhood
LoDo & Capitol Hill
98203 · 98218Downtown and the Capitol Hill corridor have seen investment from both Xfinity and Quantum Fiber. High-rise buildings in LoDo may have building-level service agreements. Check with your property manager before shopping independently.
Highlands & LoHi
80202 · 80211The Highlands area is a mix of older bungalows and newer infill. Xfinity cable covers most of it. Quantum Fiber footprint is present in parts. Worth running the address check before assuming cable is the only option.
Aurora & Stapleton
80010 · 80247 · 80238East Denver and Aurora have solid Xfinity cable coverage. Quantum Fiber availability is more limited in the outer eastern suburbs. T-Mobile 5G is a viable alternative in areas where fiber has not reached.
Westminster & Thornton
80031 · 80023 · 80260North Denver suburbs with good cable coverage. Fiber is expanding but slower to these areas than to the urban core. New construction in Thornton sometimes includes fiber infrastructure from day one.
Five Denver situations, five different answers
📦 You just moved to Denver
Denver's growth means installation wait times can run long, especially at peak rental season in May–August. Order early if you have a move-in date.
Sam suggests: start the address check before your move. Bridge with T-Mobile 5G if the installation date falls after you arrive.
💰 Your bill jumped
Almost always the twelve-month promo expiring. Call retention first. If Quantum Fiber has reached your block since you last checked, this may be the right time to switch.
Sam suggests: know your year-two Xfinity rate before calling anyone. Compare it against Quantum's base rate.
💻 You work from home
Upload matters. Xfinity cable upload is a fraction of its download on every tier. Quantum Fiber is symmetrical.
Sam suggests: Quantum Fiber wherever available. If not, Xfinity 600 Mbps cable is the next option. See best internet for remote work.
🎮 You game or stream
Latency and consistency matter more than bandwidth. Wired is more predictable than 5G for gaming at evening peak times.
Sam suggests: Quantum Fiber first, Xfinity cable second. 5G home is a last resort for latency-sensitive play.
🏷 Lowest cost that works
Xfinity intro is the cheapest wired entry. T-Mobile $50 flat avoids the promo cliff. Compare month-thirteen totals before deciding.
Sam suggests: see cheap internet plans guide for real two-year cost comparisons.
What to know before signing up for internet in Denver
Quantum Fiber still has legacy CenturyLink DSL copper on some Denver addresses. Confirm the plan is fiber before ordering.
ask specificallyXfinity promotional rates typically step up at twelve months. Quantum offers price-lock plans on some tiers.
+$15–20/mo on cableXfinity rents a gateway. Quantum includes a router on most fiber plans.
up to $15/moA new fiber drop at an address never previously served can take one to three weeks. Order early if you have a firm move-in date.
1–3 weeks for new dropsQuestions Denver residents ask
Is CenturyLink still available in Denver or has it changed?
CenturyLink's residential internet in Denver has rebranded to Quantum Fiber. The underlying infrastructure is the same network, now being actively upgraded. If you search for CenturyLink in Denver, you will be redirected to Quantum Fiber's ordering page. The service, pricing, and support have all been unified under the Quantum brand.
Does Quantum Fiber have a price-lock guarantee?
Some Quantum Fiber plans in Denver include a price-lock, meaning the rate you sign up for does not change for the duration of the guarantee period. Not all plans include this — check the specific plan terms at ordering. It is one of the features that differentiates Quantum from Xfinity's promo-then-step-up model.
What is the fastest internet available in Denver?
Quantum Fiber at up to 8 Gbps symmetrical where it reaches. Xfinity's highest available tier is 2 Gbps download (upload far lower). For most households, speeds above 500 Mbps have no practical benefit.
How long does internet installation take in Denver?
T-Mobile 5G ships in two to four days. Xfinity cable installation is typically three to seven days. Quantum Fiber at an address with existing infrastructure is similar. A new fiber drop to a building never previously served can take one to three weeks, sometimes longer during Denver's summer rental peak.
Do Denver internet providers require contracts?
No. Xfinity, Quantum Fiber, and T-Mobile 5G Home are all available without long-term contracts. The real commitment risk is promotional pricing: Xfinity's rate steps up at month thirteen regardless of whether you signed a contract.
What internet works best in a Denver apartment?
Check whether your building has a bulk service agreement first. If not, Quantum Fiber where available, Xfinity cable as the widest fallback. Newer Denver apartment communities in Capitol Hill and LoHi sometimes have fiber already run to the building, making activation faster.
Can I use my own router with Xfinity in Denver?
Yes. Xfinity supports your own DOCSIS 3.1 modem plus router, avoiding the gateway rental fee. Check Xfinity's approved device list before purchasing a modem. Quantum Fiber typically requires their gateway but allows your own router behind it.
Which is better for working from home in Denver — Xfinity or Quantum Fiber?
Quantum Fiber where it is available. Symmetrical upload is the deciding factor for daily video calls and large file transfers. A 300 Mbps Quantum Fiber plan outperforms a 1 Gbps Xfinity cable plan for remote work use cases.
Guides worth reading
Nearby cities
Not sure which is right for your Denver address?
Denver is a market where availability genuinely varies by building. Tell us your address and we will tell you what reaches it and what the real first-year cost looks like.
Mon–Sun 8am–10pm EST · Free · Same fee whichever plan you choose
Sources & method
- Pricing verified against each provider's public ordering page.
- Availability confirmed at street-address level. Ranges shown where sources disagree.
- J.D. Power 2025 US Residential ISP Study for satisfaction data.
- Affiliate disclosure: ShopLikeSam earns the same referral fee regardless of plan. How we compare.
📱 Phone Plans
Best phone plans in Denver
All three national networks cover Denver well. MVNOs on those same towers cut monthly bills by 50–70%.
Build-your-own: pay for only the data you use. 1 GB at $9/mo, unlimited at $29/mo. No activation fee. Same T-Mobile towers as a full-price plan.
5 GB for $15/mo for the first three months, then ~$25/mo annual. No contract after first term. Same towers, roughly half the price of T-Mobile direct.
Unlimited on Verizon's network at $25/mo flat. No contract. Good if Verizon has the strongest signal at your Denver address or in the mountain corridors you frequent.
All Denver phone plans, filtered
Showing all options
Build your own. Pay only for data you use. No activation fee, no contract.
Cheapest plan in Denver3-month intro, then 12-month plan. Same T-Mobile towers. ~$25–30/mo unlimited on the annual plan.
Best value pickUnlimited on Verizon's network. $25/mo base, $45 for premium priority data. No contract.
Full T-Mobile unlimited with priority data. Best direct-carrier option on Denver's T-Mobile network.
Mid-tier AT&T unlimited with 75 GB priority data. Good for AT&T coverage areas in the Denver metro.
Verizon's entry unlimited. C-Band 5G strong across the Denver urban core. Full Verizon network access.
Call Sam on (978) 723-5746.
Mint Mobile on T-Mobile towers cuts the bill roughly in half. Tello is cheaper still. Visible on Verizon at $25 is a good pick if you spend time in mountain areas where Verizon has historically had stronger rural/highway coverage than T-Mobile. Check signal at your specific address before committing.