Visitor

 • 

1 Message

09/24/2026 6:38 PM

Change cablecard serial number on account

Hello, 

I need to change the cablecard serial number on my account before I can activate/pair a replacement.

The page that shows my old (failed) card tells me to "contact the CableCARD activation support line at 1-877-405-2298 for assistance". 

That got me nowhere.

A chat with Xfinity Assistance today told me:

"To add your CableCARD serial number Mxxxxxx (I redacted the SN) to your account, you need to contact Xfinity customer support. You can reach out to them through their support page. Make sure to have your CableCARD ready, as they will assist you in pairing and activating it with your account. If you have any questions about compatibility or need further assistance, you can also check your device's manual or the manufacturer's website for more information."

I've had no luck with that suggestion.

If the serial number is added I can take care of updating the Host ID and Data info.

It appears I need to direct message you with the serial number.

If activating the DM option on my account is required please do that.

Thank you!

Oldest First
Selected Oldest First

Official Employee

 • 

2.6K Messages

2 days ago

Hello, @user_59zzq8 thank you for reaching out over Xfinity Forums. You've contacted the right place for support, but wanted to help get the proper expectations set up that we have stopped supporting new cable cards starting October 24, 2024 (almost 2 years): https://www.xfinity.com/support/articles/what-is-cablecard

This would be why the phone number and website: https://cablecardactivation.xsp.comcast.net/ are no longer an option. I see the website is going to be retired here at the end of the month as well. 

I can't guarantee I'd be able to get this activated, but have been successful at times helping other cable card users (typically with existing equipment already on account) and would definitely like to investigate furher. This will require me to gather some information that we won't want here in our public conversation.

 

Could you please send our team a direct message with your full name and full address?

 

To send a direct message: 

Click "Sign In" if necessary

• Click the "Direct Message chat" icon

• Click the "Start new message" (pencil and paper) icon

• In the "To:" line type "Xfinity Support" as you type the drop-down list which appears. Select the "Xfinity Support" graphic replaces the "To:" line

• Type your message in the text area near the bottom of the window, please add your full name and address

• Press Enter to send it


https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1e570934d009185c514

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