•
Cable modem serial number, which is on the cable modem label . See Label on
page 8
•
Cable modem MAC address, which is on the cable modem label. See Label on page
8
The following is contact information for cable Internet providers that support your cable
modem.
Table 2. Cable Internet provider contact information
Contact Information
Cable
Internet
Provider
https://cox.com/activate
1-888-556-1193
Cox
https://support.mediacomcable.com/
1-855-Mediacom (1-855-633-4226)
Mediacom
https://install.optimum.com/JointInstall/
1-877-810-6750
Optimum
https://support.sparklight.com/
1-877-692-2253
Sparklight
https://activate.spectrum.net/
1-833-267-6094
Spectrum
Download the Xfinity app via the App Store or Google
Play.
https://xfinity.com/support/articles/activate-internet-gateway-modem
https://www.xfinity.com/support/internet
Xfinity
Note: Your cable Internet provider’s contact information might change. You can find
the contact information in your monthly Internet service billing statement.
To activate your Internet service:
1. Visit your cable Internet provider’s website and follow the onscreen instructions to
activate your Internet service.
2. If you are unable to activate your Internet service using the instructions on your cable
Internet provider’s website, call your cable Internet provider for support.
3. Perform an Internet speed test to verify that you are receiving the subscribed data
rate.
User Manual
11
Hardware Setup
Nighthawk CM2500 Cable Modem
