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NETGEAR Nighthawk CM2500 2G DOCSIS 3.1 Cable Modem

BH #NECM2500100N • MFR #CM2500-100NAS
15 reviews
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NETGEAR Nighthawk CM2500 2G DOCSIS 3.1 Cable Modem
Key Features
  • Xfinity, Spectrum & Cox Compatible
  • DOCSIS 3.1 Compatible
  • Up to 2 Gb/s Download Speed
  • Up to 1 Gb/s Upload Speed
Enjoy smooth multi-Gig internet connections while saving money on equipment rental fees with the Netgear Nighthawk CM2500 2G DOCSIS 3.1 Cable Modem. With 32x8 DOCSIS 3.1 technology, this mid/high split cable modem can deliver up to 2 Gb/s download speeds and 1 Gb/s upload speeds with compatible service plans from Comcast Xfinity, Charter Spectrum, and Cox. Please note that Xfinity Voice plans are not supported.
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NETGEAR CM2500 Overview

Enjoy smooth multi-Gig internet connections while saving money on equipment rental fees with the Netgear Nighthawk CM2500 2G DOCSIS 3.1 Cable Modem. With 32x8 DOCSIS 3.1 technology, this mid/high split cable modem can deliver up to 2 Gb/s download speeds and 1 Gb/s upload speeds with compatible service plans from Comcast Xfinity, Charter Spectrum, and Cox. Please note that Xfinity Voice plans are not supported.

With two Gigabit Ethernet ports, this modem allows you to upgrade to multi-Gig internet plans at your own pace. Combine the Ethernet ports using link aggregation for 2 Gb/s connections to compatible routers, providing smooth video streaming, online gaming, and file transfer experiences to connected devices. Simply connect your cable service's coax cable to the Nighthawk CM2500 to get started.

Compatibility and Performance
  • Xfinity: 900 Mb/s Download, 100 Mb/s Upload
  • Spectrum: 900 Mb/s Download
  • Cox: 900 Mb/s Download, 100 Mb/s Upload
    • Note:
    Not compatible with Xfinity Voice plans.
    UPC: 606449157758

    NETGEAR CM2500 Specs

    Type
    Cable Modem DOCSIS: 3.1
    Inputs/Outputs
    1x Coaxial
    2x RJ45 Gigabit Ethernet
    Channels
    32x Downstream / 8x Upstream
    2x Downstream / 2x Upstream (OFDM)
    Mobile App Compatible
    No
    Dimensions
    8.2 x 6.8 x 3.7" / 208 x 172 x 94 mm
    Weight
    1.1 lb / 495 g
    Packaging Info
    Package Weight
    2.45 lb
    Box Dimensions (LxWxH)
    10.1 x 9.2 x 4.6"

    NETGEAR CM2500 Reviews

    Nighthawk incompatability

    By M. Hayes
    Rated 1 out of 5
    Date: 2026-07-18

    Nighthawk Router is not compatible with some of our existing products so we are not able to use it.

    THRILLED with SPEED with NetgearCM1000 vs the older CM500

    By Jim Linderman
    Rated 5 out of 5
    Date: 2026-05-31

    I replaced my Netgear CM 500 with the Netgear CM 1000 as the 500 was very updated and could no longer get further updates. without changing my Wi-Fi at all, I went from 50 megs to 200! Everything runs smoothly… I’m thrilled (I was not thrilled with how difficult Xfinity made this to activate!)

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