Xfinity dynamic ip address. Aug 29, 2025 · Ranges for Dynamic IP Addresses Hello, I am attempting to set some security on an Internet app. Thank you to all that helped with information. These are published to several DNSBLs that track dynamic IP space. This will force a change of your Comcast assigned WAN / public IP address. org) to keep your public domain name pointed at your public IP address even when your public IP address changes. If you need an additional dynamic IP address for devices within your network, you might be able to use features like subnetting or network address translation (NAT) to manage multiple devices. Mar 23, 2022 · Looking for guidance on how to set up a static IP for one of my connected devices on my residential gateway I know it isn't working because it is sending these commands to my local router and not out the WAN port to Comcast. Archived post. This is something that will automatically change when the lease time expires on the modem. x, which used to be 172. I just got off the phone with an Xfinity representative and they had told me that their dynamic IP addresses are changed every time the modem/router is reset for whatever reason. Although they can change at any time, they typically don't change for long periods, perhaps years, unless the user changes their router or gateway (the public IP is linked to the MAC address of these devices). Hello, I have consumer internet through Xfinity. Have you been noticing any intrent connection issues lately? I just got off the phone with an Xfinity representative and they had told me that their dynamic IP addresses are changed every time the modem/router is reset for whatever reason. Oct 17, 2024 · @user_90a8a6 If you are using a router that has a MAC address cloning feature, you can clone a different MAC address in to it. This article also includes the steps to: Obtain an Internet Protocol (IP) address automatically (both IPv4 and IPv6) Obtain the Domain Name System (DNS) server address automatically Verify the IP address is Dynamic Host Configuration Protocol (DHCP) Enabled Clear all the Windows Jul 8, 2022 · Learn about Comcast Business static IP address guidelines, usage, and notation in this comprehensive overview. 0 Network maintenance. Several factors can cause your IP address to change, including Comcast's network management, infrastructure upgrades, or even simple device resets. x and/or 54. This article lists the steps to configure Windows 10 network settings for Xfinity Internet on your computer. as long as you don’t change the modem (ip sticks to the MAC address of the modem), the ip will stay the same. Oct 22, 2019 · A dynamic IP address, for IPv4 and IPv6, has the potential to change at any given interval. I heard somewhere if you have the option for many static ip's you can also set it in bridge mode and be able to have that many dynamic ip adresses as well?. We do CGN by default, with the option of Public IPs so most of these setups do not work initially after changing service. Sep 15, 2023 · To change your IP address on Comcast, you will have to release a new IP address using system settings. I know Xfinity's IP addresses are dynamic, thus will change. Jun 3, 2025 · woo_r10 Thanks for confirming that for me, Xfinity typically uses Dynamic IP addresses, meaning they change periodically. Is there a method I can use to do this, or a customer support number I can call specifically for this issue? Thanks. " But if you ever get a new gateway or router, your IP address will change. I heard if you get it with static ip plan, you can turn them into dynamic ip by just putting it into switch mode and adding modems. Im trying to use dynamic IPs to escape DoS attacks that would occasionally come under. While comcast says that their residential account are DHCP based, the IP's are still very sticky in that you can have the same IP for years and almost static (although they wont guarantee that it wont change). An IP address is a unique number assigned to every device on a network. Dec 17, 2021 · Comcast's residential IP addresses are not static, they are dynamic. Apr 14, 2021 · I am an Xfinity wifi customer, trying to set up a mesh wifi network at home but need to input the details about the type of internet connection (e. They dont really have a mechanism at the CSR level to change your IP. Nov 6, 2020 · If you are using a straight cable modem or a gateway in Bridge Mode, changing your router's MAC address and rebooting the modem should cause Comcast to assign a new public IP address. Get complete instructions on how to release and renew your IP address when needed. Is this a new range of IPs that Xfinity is adding new, or am I just noticing it now? Image text: Using a Dynamic versus a Static IP address Comcast provides Dynamic and Static IP addresses. Doing some digging I see that comcast has a huge chunk of public IPs for what it calls "Dynamic IP ranges". x. Dynamic IP, static IP, PPPoE, L2TP, PPTP, DS-Lite), and input the settings associated. I use an official Xfinity router and I’m willing to buy another router that has the ability to use dynamic IPs in the case there is no solution with just my rented Xfinity router. 30. 16. Basically that all requests originating from IP addresses outside of a set range will not be able to execute admin actions. Your Local IP addressing scheme is configured during initial setup. Feb 5, 2022 · I have been getting too many DoS attacks which is slowing my internet service! I want a dynamic internet service! I want my ip address to be constantly changing! Why they say dynamic and give you Aug 27, 2024 · If you use Comcast Cable Internet service, you've probably noticed that the IP address hasn't changed for over a year and even though Comcast service tech support says your IP is dynamic, it's really pretty much static (saving you the static IP fee). Comcast’s currently published “Dynamic IP Ranges”: Feb 7, 2025 · Learn how to easily find Comcast IP address in USA on various devices, manage network settings, and ensure secure connections with my step-by-step guide. However, it's essentially static, not changing since I got it. The LAN addressing scheme determines the IP addresses distributed by the Comcast Gateway to the clients on your local area network, such as computers, phones, and point of sale terminals. 0/13 24. (This is the case with most ISP's) The only reason it often doesn't change for years is because Comcast dynamic IP addresses are "sticky. Does comcast business really come with 5-13 dynamic ip addresses? I have seen this mentioned before. For Windows, use the ipconfig /release command, and for MacOS, go to system preferences, select Network, and change the IP address. A Dynamic IP address is assigned by the network when a connection to the Gateway device initiates, and changes over time, at any given interval. IPv4 24. It is worth noting that Comcast's Residential Internet service does not offer a static IP, only a dynamic IP address that is subject to change at any time. Aug 10, 2017 · If Comcast changes your public IP address a lot, you could use a Dynamic DNS solution like Dyn. A lease time is usually assigned to the IP address and once it has expired a different IP address is assigned to the device. So what are my options to get a new IP Address from Comcast? UPDATE: I was able to change the Mac Address on my router and this did give me a new ip address. 0. 0/12 24. If your network uses a different IP addressing scheme, you can make those changes in the LAN IP setup. New comments cannot be posted and votes cannot be cast. . g. This has a dynamic IP. Aug 11, 2024 · Dynamic IP Address: Most residential Xfinity plans come with a single dynamic IP address, which is assigned to your router and changes periodically. Jun 9, 2024 · I noticed that my DHCP IP address from Xfinity is now 10. Comcast basically gives you a static up already. May 26, 2024 · We have top-tier IP package and are Diamond customers - been with Xfinity for 15+ years. I've recently run into a problem where I need the IP to be changed. Feb 3, 2025 · Learn how to find Xfinity IP address in USA, troubleshoot issues, change IP, secure your network, and explore dynamic vs static IPs. Dynamic IP Ranges Below is a list of our dynamic IP space. com (dyndns. 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”). hmcn3wzjqapdrgaw9dcueb7ox1v0y324tsk5cvipe