High Speed Internetin Castle Rock, CO.
Locally owned and blazing fast. From your neighbors in Douglas County.
Residential Speeds up to 1 Gbps • $0 Standard Installation.
No credit card required • Cancel anytime
Enter your service address above or call (970)-305-5855 to get started.
Enter your service address above or call
(970)-305-5855 to get started.
What Our Castle Rock Customers Say
Hear about our internet service from your neighbors in Douglas County.
"Best Internet Service Provider I've worked with. The experience has been flawless for our organization. If a solid network is essential for your opera..."
Brett H.
Crested Butte, CO
"Xtream Internet service is absolutely the greatest Internet service."
Cindy W.
Douglas County, CO
"Great local company! Service works and supports all of our in home needs. Their customer service is spot-on. I can always call and speak to someone di..."
Sam E.
Gunnison Valley, CO
"Xtream Internet is amazing. Customer service, always on the edge of leading technology. Love this company!"
Sharon L.
Douglas County, CO
"Both my wife and I work from home over 90% of the time, I work for NASA and she runs her own consulting firm out of our home."
Vince R.
Douglas County, CO
"Our experience with Xtream has been nothing but exceptional."
Allison P.
Crested Butte, CO
"So often living outside city limits means trading scenery for a quality internet connection. Xtream Internet stands out as the single best rural provi..."
Preston C.
Gunnison Valley, CO
"We have used Xtream Internet for the past 3 years and highly recommend their product and service. They are top notch!"
Barry H.
Douglas County, CO
"They are able to provide reliable high speed internet to my Sedalia ranch when other companies simply cannot!! And at a competitive price."
Gary O.
Sedalia, CO
"Customer Service is absolutely amazing. You won't get someone from overseas who has absolutely no idea who you are and reads off a script and asks you..."
Corey G.
Gunnison Valley, CO
"We stream our TV services plus several devices, phones, IPads, laptop. Living in this location away from cables, this is the best service we found in ..."
Jose F.
Douglas County, CO
"Great service by the Xtream team and strong signal. I highly recommend!!"
Keith C.
Douglas County, CO
"These guys are EVERYTHING that you want in an Internet Provider--knowledgeable and friendly with great Internet service."
John T.
Gunnison Valley, CO
"Best Internet Service Provider I've worked with. The experience has been flawless for our organization. If a solid network is essential for your opera..."
Brett H.
Crested Butte, CO
"Xtream Internet service is absolutely the greatest Internet service."
Cindy W.
Douglas County, CO
"Great local company! Service works and supports all of our in home needs. Their customer service is spot-on. I can always call and speak to someone di..."
Sam E.
Gunnison Valley, CO
"Xtream Internet is amazing. Customer service, always on the edge of leading technology. Love this company!"
Sharon L.
Douglas County, CO
"Both my wife and I work from home over 90% of the time, I work for NASA and she runs her own consulting firm out of our home."
Vince R.
Douglas County, CO
"Our experience with Xtream has been nothing but exceptional."
Allison P.
Crested Butte, CO
"So often living outside city limits means trading scenery for a quality internet connection. Xtream Internet stands out as the single best rural provi..."
Preston C.
Gunnison Valley, CO
"We have used Xtream Internet for the past 3 years and highly recommend their product and service. They are top notch!"
Barry H.
Douglas County, CO
"They are able to provide reliable high speed internet to my Sedalia ranch when other companies simply cannot!! And at a competitive price."
Gary O.
Sedalia, CO
"Customer Service is absolutely amazing. You won't get someone from overseas who has absolutely no idea who you are and reads off a script and asks you..."
Corey G.
Gunnison Valley, CO
"We stream our TV services plus several devices, phones, IPads, laptop. Living in this location away from cables, this is the best service we found in ..."
Jose F.
Douglas County, CO
"Great service by the Xtream team and strong signal. I highly recommend!!"
Keith C.
Douglas County, CO
"These guys are EVERYTHING that you want in an Internet Provider--knowledgeable and friendly with great Internet service."
John T.
Gunnison Valley, CO
"Best Internet Service Provider I've worked with. The experience has been flawless for our organization. If a solid network is essential for your opera..."
Brett H.
Crested Butte, CO
"Xtream Internet service is absolutely the greatest Internet service."
Cindy W.
Douglas County, CO
"Great local company! Service works and supports all of our in home needs. Their customer service is spot-on. I can always call and speak to someone di..."
Sam E.
Gunnison Valley, CO
"Xtream Internet is amazing. Customer service, always on the edge of leading technology. Love this company!"
Sharon L.
Douglas County, CO
"Both my wife and I work from home over 90% of the time, I work for NASA and she runs her own consulting firm out of our home."
Vince R.
Douglas County, CO
"Our experience with Xtream has been nothing but exceptional."
Allison P.
Crested Butte, CO
"So often living outside city limits means trading scenery for a quality internet connection. Xtream Internet stands out as the single best rural provi..."
Preston C.
Gunnison Valley, CO
"We have used Xtream Internet for the past 3 years and highly recommend their product and service. They are top notch!"
Barry H.
Douglas County, CO
"They are able to provide reliable high speed internet to my Sedalia ranch when other companies simply cannot!! And at a competitive price."
Gary O.
Sedalia, CO
"Customer Service is absolutely amazing. You won't get someone from overseas who has absolutely no idea who you are and reads off a script and asks you..."
Corey G.
Gunnison Valley, CO
"We stream our TV services plus several devices, phones, IPads, laptop. Living in this location away from cables, this is the best service we found in ..."
Jose F.
Douglas County, CO
"Great service by the Xtream team and strong signal. I highly recommend!!"
Keith C.
Douglas County, CO
"These guys are EVERYTHING that you want in an Internet Provider--knowledgeable and friendly with great Internet service."
John T.
Gunnison Valley, CO
Internet Plans Available in Castle Rock
From everyday browsing to large households with heavy data usage requirements, we have the right solution for you.
Xtream Ultra
Fast, dependable internet for heavy users
Download • 50 Mbps Upload
- No contracts
- No hidden fees
- Unlimited data
- Local 24/7 support
- Earth reliability & latency
Xtream AirFiber
Max speeds for heavy users or large households
Download • 100 Mbps Upload
- No contracts
- No hidden fees
- Unlimited data
- Local 24/7 support
- Earth reliability & latency
Communities
Fiber for HOAs & MDUs
Download • 10,000 Mbps Upload
- Multi-gigabit fiber
- Guaranteed speeds, latency, uptime
- Dedicated infrastructure & support
- Property-wide coverage
- Discounted bulk pricing
Why Castle Rock Chooses XtreamInternet
Internet service built for Douglas County.
Locally Owned & Operated
We live and work in Douglas County. When you call, you talk to a real person in Colorado — not a call center overseas.
Fast & Reliable
Stream, game, and work without slowdowns, backed by our 99.9% uptime guarantee.
No Data Caps, Ever
Forget about overage charges or data caps. We offer unlimited data on every single plan.
Real Speeds
We don't advertise speeds we can't deliver. Your plan speed is your actual speed.
Whole-Home Wi-Fi Included
Every plan includes enterprise-grade Wi-Fi that covers every corner of your home.
Earth-Based
Internet delivered from a nearby fiber-fed tower is better than internet from space. It's just physics.
Our Services
Comprehensive internet solutions for every need.
Wireless Internet
Our wireless technology is designed for high performance in rural areas, with high-speeds, ultra reliability and low latency.
Learn MoreWhole-Home WiFi
Complete coverage with mesh technology. No dead zones, ever.
Learn MoreFiber-Optic Internet
Multi-gigabit symmetrical fiber internet for HOAs, condos, hotels & resorts, developers, and businesses.
Learn MoreServing Castle Rock and Surrounding Communities
XtreamInternet provides high-speed internet throughout Castle Rock and the greater Douglas County area. Whether you're in town near the Outlets, out toward Franktown, up by Castle Pines, or south toward Larkspur — we likely have you covered.
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Internet in Castle Rock — Common Questions
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