To block a phone number on Comcast Xfinity Voice, use the Xfinity Voice Call Blocking Settings page to add unwanted numbers. This primary web-based method gives you direct control over which callers reach your home phone.
How to block a phone number on Comcast Xfinity Voice
The most direct way to block a phone number on Comcast is through the official Xfinity Voice Call Blocking Settings page. Sign in with your Xfinity ID and password, or if you have Xfinity Voice only, you can sign in using your Xfinity Voice telephone number and voicemail password. Once signed in, enter the telephone number you want to block and click Add. To remove a block later, click the trash icon next to the number. You can also block anonymous calls by selecting the checkbox for Block Anonymous Calls. Additionally, you can block a number directly from Call History or Voicemail by selecting Block Caller and then Confirm.
Automatic call blocking features already on your line
Your Xfinity Voice line comes with several automatic blocking features at no extra charge. Calls to 900/976/700/500 numbers are already blocked and this block cannot be removed. Xfinity Voice also includes Spam Blocker with no installation required, plus Edge Blocking for residential voice customers at no additional cost. For blocking your caller ID when placing outgoing calls, Comcast documents *67 on a call-by-call basis, but that is not a way to block incoming callers. These features handle many nuisance calls without any setup on your part.
Block numbers using your phone's built-in controls
For blocking calls and numbers directly on your device, Comcast documents the native blocking steps for iPhone and Android. On an iPhone, open the Phone app, then from a saved contact scroll down and tap Block this Caller; from Recents, tap the blue i icon and scroll down to Block this Caller. On an Android phone, open the Phone app, then from Recents or Contacts, choose More, Details, or the three vertical dots icon, then select Block. These are your phone's own built-in blocking controls and work independently from the Xfinity Voice settings.
Frequently Asked Questions
Is blocking a phone number on Comcast free?
Yes, blocking numbers through the Xfinity Voice Call Blocking Settings page and using the automatic features like Spam Blocker and Edge Blocking are included with your residential service at no additional charge.
Will a blocked caller know they are blocked?
No, when you block a phone number on Comcast, the caller receives no notification that they have been blocked. The call simply does not reach your phone, so you won't have to know if youre blocked or their phone is dead to understand why a call stopped coming through.
Is there a limit to how many numbers I can block?
One Comcast forum answer says Selective Call Rejection for Xfinity Business Voice allows up to 12 numbers, but that is a business-voice forum post, not the residential Xfinity Voice help page. If you need help understanding how to unblock phone number on landline settings, you can manage removals through the same settings page by clicking the trash icon next to any number.
Can I block a number using the Xfinity Connect app?
The current Xfinity support documentation directs customers to the Xfinity Voice Call Blocking Settings page for blocking numbers, not the Xfinity Connect app. For the most reliable method, use the web-based settings page.
What if I need help blocking a number?
Comcast's help pages indicate you can contact customer service for more information on call blocking. They can assist with questions about your account or the available blocking features.
Does Comcast offer a way to block a telephone number from my mobile phone?
For calls coming to your Xfinity Voice landline, the primary method is the web-based settings page. For calls to your Xfinity Mobile device, you can use your smartphone's built-in blocking controls as documented by Comcast, which include the iPhone and Android steps listed above.
