Overview

  • MAXIMIZE YOUR CABLE INTERNET: A dedicated DOCSIS 3.1 cable modem lets you pair any WiFi router or mesh system you choose, so you can build the home network you want and upgrade your WiFi anytime without replacing your modem.
  • APPROVED FOR YOUR PROVIDER AND PLAN: Works with Xfinity, Spectrum, Cox, and most US cable providers on internet plans up to 2 Gbps. Not compatible with Verizon, AT&T, CenturyLink, DirecTV, DISH, or bundled voice plans. ISP activation required after setup.
  • GET THE FULL SPEED OF YOUR PLAN: DOCSIS 3.1 supports plans up to 2 Gbps download and 1 Gbps upload, so sending large files and live streaming move nearly as fast as downloading. Actual speeds vary by plan and provider.
  • FUTURE-PROOF YOUR HOME NETWORK: Two Gigabit Ethernet ports connect to a compatible router, with Link Aggregation combining both for speeds up to 2 Gbps. Ready for today’s multi-gig plans and tomorrow’s upgrades.
  • SET UP AND MANAGE YOUR MODEM WITH THE NIGHTHAWK APP: Download the free Nighthawk app on iOS or Android for guided setup. Check modem status, run speed tests, and manage firmware updates from anywhere. Active internet required.
  • RELIABLE PERFORMANCE: DOCSIS 3.1 Active Queue Management prevents slowdowns during peak-hour congestion, keeping speeds steady when the whole family is online. FCC certified for use in the United States.

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Specifications

Capacity & configuration

Modem Type
High speed

Dimensions & weight

Product Name
NETGEAR Nighthawk DOCSIS 3.1 Cable Modem CM2500, 2 Gbps, Multi-Gig, Guided Set Up, 2 Gigabit Ports, Xfinity/Spectrum/Cox
Product Height
6.8 inches
Product Length
3.7 inches
Product Width
8.2 inches
Product Weight
1.09 pounds

Features

Brand
NETGEAR
Color
Black
Internet Service Provider (ISP) Compatibility
Cox Communications
DOCSIS Certification
3.1
Downstream Data Speed
2000 megabits per second
Upstream Data Speed
1000 megabits per second
Channel Bonding
32 x 8
Number of LAN Ports
2
Quality Of Service (QoS) Traffic Prioritization
Yes
DOCSIS Compliant
Yes
Wired Speed
2000 megabits per second
Gigabit Ethernet Speed
Yes
System Requirements
Cable Broadband Internet service, Wi-Fi router required for connection to Wi-Fi devices
UPC
606449157758

Power & warranty

Model Number
CM2500-100NAS
Warranty - Parts
1 year
Warranty - Labor
90 Days

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
MyreviewOct 25, 2026 · Verified purchase ★★★★★

Solid DOCSIS 3.1 Modem. Mediacom preferred. - Simple installation right out of the box! Great speeds.

TerenceNSep 21, 2026 · Verified purchase ★★★★★

Works amazing - Perfect price and perfect speeds. It supports my network up to several gigs a second

JOHNTSep 4, 2026 · Verified purchase ★★★★★

Netgear Nighthawk Cable modem - Easy to install. It replaces the cable modem from you carrier, so you save the monthly fee. Then I added a mesh wi fi router and have great coverage everywhere in the home Upstairs, main floor and finished basement , even the patio and driveway which is desirable for the security cameras.

JohnAug 31, 2026 · Verified purchase ★★★☆☆

Modem is fine when not defective - Description: Second one of this unit works well. Had it connected and working within 10 minutes. That follows purchase of a defective unit on which I wasted over 10 hours on the phone with four Netgear analysts, four ISP analysts and a $100 visit by my ISP, only to be told my internet connection was fine and the modem was defective. I wish I had gone back to Best Buy before all that. Best Buy took it back and gave me a new one with no questions asked. Really appreciate that. Netgear has done nothing for me, in spite of being supplied the information in this review.

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat