x_csr's profile



3 Messages

Sunday, May 26th, 2024 7:51 PM

Xfinity is changing our public IP every day - it used to take sometimes months/years. Why is this?

Hello guys,

In the past, our public IP wouldn't change for years or months sometimes.

But suddenly in the past week or two, it is changing every day now like clockwork.

This obviously causes big problems with extra verification steps required by most web sites when they see a new inbound IP.

The typical mechanism for sites to verify is sending a code through SMS or email but some of our financial sites are more involved.

So this is a big hassle.

Clearly they must know that this situation is anti-consumer.

Does anyone know why Xfinity is doing this suddenly?  We have top-tier IP package and are Diamond customers - been with Xfinity for 15+ years.

Also, this is somewhere buried in the Acceptable Use Policy for Internet:

"Prohibited:  access and use the Service with anything other than a dynamic Internet Protocol (“IP”) address that adheres to the dynamic host configuration protocol (“DHCP”). You may not configure the Service or any related equipment to access or use a static IP address or use any protocol other than DHCP unless you are subject to a Service plan that expressly permits you to do so."

So apparently, NAT'ing a public IP on our own is prohibited.  And Xfinity does not even offer a static IP option package for their customers?

We know Xfinity can do whatever they want while supplying internet service - that's their prerogative, we're just trying to gather info and see if there's something we can do before we switch to another ISP.


Official Employee


961 Messages

18 days ago

Hey @x_csr,


Thank you for sharing your experience with us on our official Xfinity Forums Community support page. Please accept my most sincere apology for the experience you have encountered. With assignment of dynamic IPs, they can change from time to time. Maintenance, system settings changes, and more. 


In most cases, you would have the IP address for a longer period of time, but that is subject to change. If you have a systems critical need, you can always look into our Comcast Business class of service which does have the option for a static IP address. 



3 Messages

@XfinityDemitrius​ Thanks for response.  It hasn't changed since May 27 (right around when I posted this thread).  It's been the same for about 8 or 9 days now.  If it helps as post-mortem (because surely this was affecting others), it was changing every day starting around May 20 or so through May 26 and stopped changing on May 27.  Thanks again!  We're good now.

Official Employee


1.6K Messages

We are glad to take a closer look at this for you @x_csr.  Please feel free to shoot us a private message so that we can get started.  



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