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#1 Recommended Plan
1. AT&T 
Speeds Up To300 MbpsIn rare cases, if your usage is contributing to congestion on the network, AT&T will greatly reduce your speed for a min. of 30 min.Connection: 5G InternetAvailability: 51.8%Why AT&T? AT&T Internet Air makes buying internet easy for customers by offering one plan with straightforward pricing and reliable 5G speeds. -
Quantum Fiber 
Speeds Up To8 GbpsNot all internet speeds available in all areas.Connection: FiberAvailability: 28.3%LIMITED TIME OFFERGet 1 Gig Internet for $45/mo for a limited time!New customers only. Limited availability. Service and rate in select locations only. Bank account payment required. Taxes and fees apply. Includes Price for Life. 360 WiFi and other equipment lease charges, discounts, taxes, and fees are excluded from Price for Life offer and rate may be increased. See full details. -
3. Xfinity 
Speeds Up To2 GbpsNot all internet speeds available in all areas.Connection: Cable, FiberAvailability: 94.1%Castle Rock speed tests confirm high speeds for Xfinity -
4. Viasat 
Speeds Up To150 MbpsNot all internet speeds available in all areas.Connection: SatelliteAvailability: 100% -
5. T-Mobile 
Download Speeds:87 Mbps - 415 MbpsRely, All-In, and Amplified Internet plans can experience fast speeds with T-Mobile’s latest 5G gateway, delivering typical download speeds between 133 Mbps – 415 Mbps. 25% of our customers see speeds below and 25% see speeds above these ranges. T-Mobile Home Internet is delivered via 5G cellular network and speeds vary due to factors affecting cellular networks. See https://t-mobile.com/OpenInternet for additional details.Connection: 5G InternetAvailability: 48.6%Castle Rock speed tests confirm high speeds for T-Mobile 5G Home Internet -
6. Mint Mobile 
Download Speeds:133 Mbps - 415 MbpsNot all internet speeds available in all areas.Connection: 5G InternetAvailability: 44.5% -
7. Verizon 
Speeds Up To300 MbpsNot all internet speeds available in all areas.Connection: 5G InternetAvailability: 35.9% -
8. CenturyLink 
Speeds Up To940 MbpsNot all internet speeds available in all areas.Connection: DSL, FiberAvailability: 67.7% -
9. XNET WiFi 
Speeds Up To2 GbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 43.9% -
10. BAM Broadband 
Speeds Up To1 GbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 66.8% -
11. Mountain Broadband 
Speeds Up To100 MbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 57.3% -
Rise Broadband 
Speeds Up To100 MbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 3.7% -
Aerux Broadband 
Speeds Up To100 MbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 25.1% -
14. Kellin Communications 
Speeds Up To300 MbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 81.1% -
15. XtreamInternet 
Speeds Up To100 MbpsNot all internet speeds available in all areas.Connection: Fixed WirelessAvailability: 85.5% -
16. Starlink 
Speeds Up To350 MbpsNot all internet speeds available in all areas.Connection: SatelliteAvailability: 100% -
17. Hughesnet 
Speeds Up To100 MbpsNot all internet speeds available in all areas.Connection: SatelliteAvailability: 100%
Internet Providers in Castle Rock, CO
Refine your search for better results:
Popular Castle Rock Internet Deals
| Provider | Featured deal | |
|---|---|---|
| Quantum Fiber | Get 1 Gig Internet for $45/mo for a limited time! |
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| Xfinity | Get reliable 300 Mbps internet with an Unlimited mobile line for $40/mo for 5 years! With no term contract — Wi-Fi equipment included |
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| Viasat | Get $30 off for your first 3 months! Price shown includes promotion; Get $30/mo. off for the first 3 months. For new customers only. You must mention this offer when ordering service to receive the discount. |
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| T-Mobile | Limited time. Get a $300 rebate (via virtual prepaid Mastercard) when you activate a new T-Mobile Internet line on an eligible All-In Home Internet plan! |
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| Verizon | Get a 43" Class QF QLED Samsung TV or Samsung Galaxy Tab S10 FE 5G on us! |
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Castle Rock Home Internet Providers
| Provider | Plans starting at | Speeds up to | Connections | |
|---|---|---|---|---|
| Rise Broadband | $25/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. | Fixed Wireless |
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| Mint Mobile | $30/mo Prices may vary depending on the plan. | 133 Mbps - 415 Mbps Not all internet speeds available in all areas. | 5G Internet |
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| Verizon | $35/mo Prices may vary depending on the plan. | 300 Mbps Not all internet speeds available in all areas. | 5G Internet |
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| Hughesnet | $39.99/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. | Satellite |
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| Xfinity | $40/mo Prices may vary depending on the plan. | 2 Gbps Not all internet speeds available in all areas. | Cable, Fiber |
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| Quantum Fiber | $45/mo Prices may vary depending on the plan. | 8 Gbps Not all internet speeds available in all areas. | Fiber |
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| Kellin Communications | $49.99/mo Prices may vary depending on the plan. | 300 Mbps Not all internet speeds available in all areas. | Fixed Wireless |
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| T-Mobile | $50/mo Prices may vary depending on the plan. | 87 Mbps - 415 Mbps Rely, All-In, and Amplified Internet plans can experience fast speeds with T-Mobile’s latest 5G gateway, delivering typical download speeds between 133 Mbps – 415 Mbps. 25% of our customers see speeds below and 25% see speeds above these ranges. T-Mobile Home Internet is delivered via 5G cellular network and speeds vary due to factors affecting cellular networks. See https://t-mobile.com/OpenInternet for additional details. | 5G Internet |
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| CenturyLink | $50/mo Prices may vary depending on the plan. | 940 Mbps Not all internet speeds available in all areas. | DSL, Fiber |
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| AT&T | $65/mo Price is per month, plus taxes. Price after discounts: $13/mo w/elig wireless svc. and $5/mo w/elig Autopay & Paperless bill. Discounts start w/in 2 bills. | 300 Mbps In rare cases, if your usage is contributing to congestion on the network, AT&T will greatly reduce your speed for a min. of 30 min. | 5G Internet |
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| XNET WiFi | $65/mo Prices may vary depending on the plan. | 2 Gbps Not all internet speeds available in all areas. | Fixed Wireless |
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| BAM Broadband | $69/mo Prices may vary depending on the plan. | 1 Gbps Not all internet speeds available in all areas. | Fixed Wireless |
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| Viasat | $69.99/mo Price shown includes promotion; Get $30/mo. off for first 3 months. For new customers only. You must mention this offer when ordering service to receive the discount. | 150 Mbps Not all internet speeds available in all areas. | Satellite |
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| Mountain Broadband | $79/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. | Fixed Wireless |
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| Starlink | $80/mo Prices may vary depending on the plan. | 350 Mbps Not all internet speeds available in all areas. | Satellite |
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| XtreamInternet | $89/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. | Fixed Wireless |
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| Aerux Broadband | $99/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. | Fixed Wireless |
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Best Internet Providers in Castle Rock, CO
Quantum Fiber is the best provider in Castle-Rock because it offers symmetrical speeds and exceptional fiber performance. Quantum Fiber provides downloads up to 8 Gbps for between $45 per month and $150 per month. While Xfinity covers more of the city, Xfinity lacks the symmetrical upload capabilities found on the Quantum Fiber network.
| Provider | Why they're great | Who they're great for | |
|---|---|---|---|
| AT&T | No annual contracts | AT&T Internet Air is ideal for renters and flexible households who want high-speed internet without being locked into an annual contract. |
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| Quantum Fiber | Fastest provider | Large households and power users who need high-capacity speeds for activities like 4K streaming will find an excellent choice in Quantum Fiber. |
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| Xfinity | Generous sign-up perks | Xfinity is an excellent choice for new customers looking to maximize savings and entertainment with plans that include free premium streaming. |
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| T-Mobile | Straightforward pricing | Customers who hate hidden costs and want straightforward pricing with no equipment fees and taxes included will love T-Mobile 5G Home Internet. |
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| Verizon | Easy installation | Customers who want a fast, plug-and-play setup with a simple self-install gateway will find Verizon 5G Home Internet perfect. |
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Castle Rock Cheapest Internet Plans
Rise Broadband offers the cheapest internet plans in Castle-Rock starting at just $25 per month. Although Rise Broadband only reaches 3.7% of the city, it undercuts the pricing of larger competitors. Residents looking for more widespread budget options might consider Mint Mobile, which starts at $30 per month.
| Provider | Plan name | Price | Speeds up to | |
|---|---|---|---|---|
| Rise Broadband | 100 Mbps Internet + Unlimited Data | $25/mo Prices may vary depending on the plan. | 100 Mbps Not all internet speeds available in all areas. |
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| Mint Mobile | 3-month w/ Mint Phone Plan | $30/mo Prices may vary depending on the plan. | 415 Mbps Not all internet speeds available in all areas. |
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| Verizon | Verizon Home Internet Lite | $35/mo Prices may vary depending on the plan. | 25 Mbps Not all internet speeds available in all areas. |
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| Viasat | Viasat Essentials | $39.99/mo Price shown includes promotion; Get $30/mo. off for first 3 months. For new customers only. You must mention this offer when ordering service to receive the discount. | 50 Mbps Not all internet speeds available in all areas. |
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| Hughesnet | Lite | $39.99/mo Prices may vary depending on the plan. | 25 Mbps Not all internet speeds available in all areas. |
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Fastest Internet Providers in Castle Rock, CO
Quantum Fiber delivers the fastest internet in Castle-Rock with top speeds reaching up to 8 Gbps. Quantum Fiber users benefit from symmetrical speeds that facilitate rapid uploads and downloads. Xfinity serves as a high-speed alternative with downloads up to 2 Gbps, though Xfinity upload speeds are significantly lower than Quantum Fiber.
| Provider | Speeds up to | Connection type | |
|---|---|---|---|
| Quantum Fiber | 8 Gbps Not all internet speeds available in all areas. | Fiber |
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| Xfinity | 2 Gbps Not all internet speeds available in all areas. | Cable |
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| XNET WiFi | 2 Gbps Not all internet speeds available in all areas. | Fixed Wireless |
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| BAM Broadband | 1 Gbps Not all internet speeds available in all areas. | Fixed Wireless |
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| CenturyLink | 940 Mbps Not all internet speeds available in all areas. | Fiber |
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Compare Top Providers in Your Area
- AT&T Internet vs. CenturyLink
- AT&T Internet vs. Xfinity
- AT&T Internet vs. T-Mobile 5G Home Internet
- AT&T Internet vs. Verizon 5G Home Internet
- CenturyLink vs. Xfinity
- CenturyLink vs. T-Mobile 5G Home Internet
- CenturyLink vs. Verizon 5G Home Internet
- Hughesnet vs. Rise Broadband
- Hughesnet vs. Viasat Internet
- Hughesnet vs. T-Mobile 5G Home Internet
- Hughesnet vs. Verizon 5G Home Internet
- Starlink vs. Viasat Internet
Check Your Current Speed
What's a Good Internet Speed?
| Internet speed | Appropriate for | Providers in your area offering this speed | Availability in your area |
|---|---|---|---|
| 100 Mbps |
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100% |
| 1000 Mbps (1 Gbps) |
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|
94.1% |
Internet Availability in Castle Rock, CO
Xfinity maintains the highest wired availability in Castle-Rock, covering 94.1% of the area. Xfinity plans range from $40 per month to $70 per month with downloads up to 2 Gbps. For the few residents outside the Xfinity footprint, Viasat Internet provides 100% total coverage of the city via satellite technology.
| Connection type | Provider with most coverage | Castle Rock availability | Starting price | |
|---|---|---|---|---|
| Satellite | Viasat Internet | 100% | $69.99/mo |
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| Cable | Xfinity | 94.1% | $40/mo |
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| Fixed Wireless | XtreamInternet | 85.5% | $89/mo |
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| DSL | CenturyLink | 67.7% | $55/mo |
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| 5G Internet | AT&T Internet Air | 51.8% | $65/mo |
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| Fiber | Xfinity | 2.2% | $0/mo |
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Castle Rock Internet Stats
| Average internet monthly cost | Available speed ranges | Available price range | Available connection types |
|---|---|---|---|
| $83.93 | 12 Mbps - 8 Gbps | $20/mo - $299.99/mo | 5G Internet, Cable, DSL, Fiber, Fixed Wireless, Satellite |
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Fastest Speed
Quantum FiberFiber
Up to 8 GIG$150/mo*Taxes & fees extra and subj. to change. See disclaimer for details. Restrictions apply. See offer details
360 WiFi included | No one-time installation fee-
Download Speeds up to 8 Gbps
Show Details -
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Best Value
AT&T Internet Air5G Internet
Internet Air$65/mo*Price is per month, plus taxes. Not available in all areas. Price after discounts: 20% w/elig wireless and $5/mo with AutoPay. Discount applied w/in 2 bills. See offer details
$100 Visa Reward Card | Save 20% with Eligible AT&T Wireless Plan-
Download Speeds up to 300 Mbps
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Perfect speeds for most families
Show Details -
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Lowest Price
Verizon 5G Home Internet5G Internet
Verizon Home Internet Lite$35/mo*Taxes & fees extra and subj. to change. See disclaimer for details. Restrictions apply. See offer details
3-year price lock guarantee-
Download Speeds up to 25 Mbps
Show Details -
Internet Coverage Map and Store Locations for Castle Rock, Colorado
Methodology
Our provider rankings rely on a rigorous, data-driven framework evaluating over 100 million rows of FCC data to bring transparency to local internet options. We track 8,000+ active plans from 2,000+ providers to cut through marketing jargon. We weigh technical factors against real-world experiences to match you with the best connections actually available at your address:
- Tested Technology: We utilize a fiber-first ranking system, prioritizing high-performance, structurally sound technologies (like fiber and cable) over slower legacy connections.
- Realistic Coverage: We filter out "ghost ISPs" with near-zero availability and actively flag providers that only cover a fraction of neighborhoods, ensuring you don't waste time on unavailable options.
- Transparent Pricing: We track base rates and downgrade providers that rely on hidden fees or sudden price hikes, exposing the true long-term cost beyond initial marketing promotions.
- Verified Speeds: We look beyond deceptive "up to" marketing claims to evaluate the actual download and upload speeds delivered, prioritizing the balanced, symmetrical performance necessary for seamless video calls and heavy streaming.
- User-Driven Personalization: We don't just look at the tech; we look at what people actually prefer. By analyzing millions of local connections, user reviews on downtime, and validated J.D. Power scores, we tailor our rankings to highlight the providers proven to satisfy users in your area.
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Data valid as of 03/23/2026