Internet providers in Castle Pines, CO
Castle Pines is a city in Colorado with about 12,573 residents and roughly 6,022 residential locations that internet providers can report on. The table below compares the providers that report service here.
Compare internet providers in Castle Pines, CO
Share of residential locations in Castle Pines where each provider reports service, from the FCC National Broadband Map (data as of December 31, 2025). Availability depends on your exact address.
| # | Provider | Technology (varies by address) | Locations covered | |
|---|---|---|---|---|
| 1 | CenturyLink / Quantum Fiber | Fiber, DSL | 99% | |
| 2 | Xfinity | Cable | 97% | |
| 3 | T-Mobile Home Internet | Fixed wireless | 97% | |
| 4 | Windfield Enterprises | Fixed wireless | 73% | |
| 5 | Istari Holdings | Fixed wireless | 70% | |
| 6 | AT&T | Fiber, DSL, Fixed wireless | 60% | Check availability |
| 7 | Verizon | Fiber, Fixed wireless | 58% | Check availability |
| 8 | BAM Broadband OpCo | Fiber, Fixed wireless | 55% | |
| 9 | Aerux LLP | Fixed wireless | 31% |
Satellite internet
| 1 | HughesNet | Satellite | 99%+ | |
| 2 | Viasat | Satellite | 99%+ | |
| 3 | Starlink | Satellite | 99%+ |
Satellite service is available at nearly every address but typically has higher latency than wired options.
Provider-reported coverage does not guarantee service or speeds at a specific address. Some "Check availability" links are affiliate links; we may earn a commission at no cost to you. How we make money.
What to know about internet in Castle Pines
CenturyLink / Quantum Fiber reports service to the most residential locations in Castle Pines, about 99%. 8 providers report coverage of at least half of locations (CenturyLink / Quantum Fiber, Xfinity, T-Mobile Home Internet, Windfield Enterprises, Istari Holdings, AT&T, Verizon, and BAM Broadband OpCo), so the market looks competitive. T-Mobile Home Internet, Windfield Enterprises, Istari Holdings, and Aerux LLP offer fixed wireless home internet, an option if you prefer no cable or fiber installation.
What technologies are available in Castle Pines?
Fiber reaches about 35% of locations in Castle Pines, so it is available in parts of the area but not everywhere. Gigabit-class service (1,000 Mbps down) is reported for about 80% of locations. DSL is still reported for about 54% of locations, which can be a fallback where fiber and cable do not reach. Fixed wireless home internet is reported for about 99% of locations.
FCC National Broadband Map, data as of December 31, 2025: share of residential locations in Castle Pines that providers report they can serve. City-level figures, not your address.
Castle Pines at a glance
About 98% of households in Castle Pines have a broadband subscription, 6 points above the Colorado average of 93%.
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2023).
Internet providers in places near Castle Pines
- Parker, CO (4 mi)
- Lone Tree, CO (5 mi)
- Castle Rock, CO (6 mi)
- Highlands Ranch, CO (8 mi)
- Centennial, CO (9 mi)
- Greenwood Village, CO (11 mi)
- Littleton, CO (12 mi)
- Columbine, CO (14 mi)
- Englewood, CO (14 mi)
- Four Square Mile, CO (15 mi)
- Ken Caryl, CO (15 mi)
- Dakota Ridge, CO (18 mi)
- Aurora, CO (18 mi)
- Denver, CO (21 mi)
- Lakewood, CO (21 mi)
- Wheat Ridge, CO (25 mi)
- Berkley, CO (25 mi)
- Golden, CO (26 mi)
- Welby, CO (27 mi)
- Monument, CO (27 mi)
Frequently asked questions
Is fiber internet available in Castle Pines?
Yes, in part. About 35% of residential locations in Castle Pines can get fiber, 97% can get cable, and about 80% can get gigabit-class speeds, per FCC data. Availability depends on your exact address.
Which internet provider has the widest coverage in Castle Pines?
CenturyLink / Quantum Fiber reports service to about 99% of residential locations in Castle Pines, the most of any provider, per FCC data. Availability still depends on your address.
How many internet providers serve Castle Pines?
9 providers report service to at least 2% of locations in Castle Pines, and 8 cover at least half. Satellite (HughesNet, Viasat, Starlink) is also available nearly everywhere.
What is the difference between fiber, cable and DSL?
Fiber offers the fastest and most consistent speeds, cable is widely available with high download speeds, and DSL runs over phone lines and is usually slower. See our guide for details.
What internet speed do I need in Castle Pines?
Most households are well served by 100–300 Mbps. Heavy streaming, gaming or many connected devices may benefit from 500 Mbps or more.
Check your exact address
Coverage for a whole community cannot tell you what is available at your door. Enter your ZIP code, then confirm with each provider.
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