192.168.100.200 Admin Login

192.168.100.200 is a private Class C IPv4 address that lives in the 192.168.100.0/24 subnet — a range closely associated with cable modems and ISP-provisioned gateway devices. While it is not itself a default router login address, it is officially recommended by manufacturers such as Arris and Motorola as the static IP you assign to your PC or router's WAN interface in order to reach the cable modem's diagnostic and status page at 192.168.100.1. Other devices in this subnet ecosystem include modems from Ubee, Huawei, ZyXEL, Ambit Microsystems, Askey, and SmartRG. If you are working within the 192.168.100.0/24 network, 192.168.100.200 is one of the most commonly referenced host addresses you will encounter in official setup documentation. Other common default gateways you may come across include 192.168.1.254 and 192.168.100.1.

How to Use 192.168.100.200 on Your Network

The address 192.168.100.200 is most commonly used as a manually assigned static IP on a computer or router's WAN port so that you can communicate with a cable modem operating on the 192.168.100.0/24 subnet. Here is how you typically use it:

• Connect your PC directly to your cable modem via an Ethernet cable.
• Open your network adapter settings and set your IP address to 192.168.100.200 with a subnet mask of 255.255.255.0.
• Set your default gateway to 192.168.100.1 — the modem's management IP.
• Open your browser and navigate to http://192.168.100.1 to access the modem's status and diagnostic page.

This procedure is officially documented by Arris for their SURFboard and other cable modem product lines. It allows you to view signal levels, event logs, and connection status without needing an active internet connection. Because 192.168.100.200 is a private IP address, it is only reachable within your local network and is never exposed to the public internet.

Which Brands and Devices Use the 192.168.100.0/24 Subnet?

The 192.168.100.0/24 subnet is primarily associated with ISP-provisioned cable modems and DOCSIS gateway devices. Unlike the more common 192.168.1.x or 192.168.0.x ranges used by standalone home routers, the 192.168.100.x range is specifically favored by modem manufacturers to avoid conflicts with downstream routers. The following brands are known to operate within this subnet:

• Arris — Arris SURFboard modems (including the SB6141, SB6183, SB8200, and others) use 192.168.100.1 as their internal management address. Arris officially recommends assigning 192.168.100.200 to your PC or router WAN port to access the modem's status page.
• Motorola — Motorola cable modems and modem-router combos also operate on the 192.168.100.x subnet, with 192.168.100.1 as the default gateway.
• Ubee — Ubee interactive modems deployed by ISPs such as TDS Telecom use 192.168.100.1 as their admin interface address, placing all connected devices in the 192.168.100.x range.
• Huawei — Certain Huawei modem-router units provisioned by ISPs default to the 192.168.100.x subnet.
• ZyXEL — ZyXEL cable modems and DSL gateways used in ISP deployments frequently use 192.168.100.1 as their management IP.
• Ambit Microsystems & Askey — These OEM manufacturers produce cable modems for major ISPs that operate on the 192.168.100.x subnet.
• SmartRG — SmartRG DSL gateways deployed by ISPs also use this subnet range.

In all of these cases, 192.168.100.200 serves as the recommended static host address for a device that needs to communicate directly with the modem's management interface.

If You Cannot Reach 192.168.100.200 or the Modem Page

If you have assigned 192.168.100.200 to your PC or router and still cannot reach the modem's admin page at 192.168.100.1, try the following steps:

• Check your physical connection: Make sure your Ethernet cable is plugged directly into the modem's LAN port — not through a switch or another router.
• Disable Wi-Fi on your PC: If your PC is connected to both Wi-Fi and Ethernet, the Wi-Fi adapter may be taking priority. Disable Wi-Fi so that only the wired connection to the modem is active.
• Verify your static IP settings: Confirm that your adapter is set to IP 192.168.100.200, subnet mask 255.255.255.0, and gateway 192.168.100.1. Any typo will prevent communication.
• Clear your browser cache: Old cached data can sometimes prevent the modem's login page from loading correctly. Try opening the page in a private/incognito window.
• Power-cycle the modem: Unplug the modem's power cable, wait 30 seconds, then plug it back in. Wait for all indicator lights to stabilize before trying again.
• Check your gateway IP: Some ISP-locked modems may use a slightly different management IP. Open a command prompt and run ipconfig /all (Windows) or ip route (Linux/Mac) to confirm the correct gateway address for your specific device.

If none of these steps work, your modem may be ISP-locked, meaning the management interface is restricted. In that case, contact your ISP for assistance accessing modem diagnostics.

Changing Your Router or Modem Password

Once you have successfully accessed your modem or router's admin panel — whether through 192.168.100.200 as your client IP or through the gateway at 192.168.100.1 — it is strongly recommended that you change the default administrator password. Default credentials are publicly known and leave your device vulnerable to unauthorized access. To change your password:

1. Log in to the admin panel using the default credentials printed on your device's label (commonly admin / admin or admin / password).
2. Navigate to the Administration, Management, or Security section of the interface.
3. Locate the Change Password option and enter a new, strong password — at least 12 characters combining uppercase letters, lowercase letters, numbers, and symbols.
4. Save your changes and log back in with the new credentials to confirm they work.

For Arris SURFboard modems, note that the admin username is fixed as admin and cannot be changed — only the password can be updated. For Motorola and Ubee devices, both the username and password may be configurable depending on the model and ISP provisioning.

Router Username and Password List

Understanding 192.168.100.200 as a Private IP Address

192.168.100.200 belongs to the 192.168.0.0/16 private address block, which is reserved by the Internet Assigned Numbers Authority (IANA) exclusively for use within private local area networks. This means the address is never routable on the public internet — it exists only within your home or office network. Specifically, 192.168.100.200 falls into the Class C IP range, which spans from 192.0.0.0 to 223.255.255.255, with a default subnet mask of 255.255.255.0.

Within the 192.168.100.0/24 subnet, there are 254 usable host addresses — from 192.168.100.1 to 192.168.100.254. The address 192.168.100.0 is the network address and 192.168.100.255 is the broadcast address; neither can be assigned to a device. The address 192.168.100.200 sits near the upper end of this range, which is why it is commonly chosen as a safe static assignment that is unlikely to conflict with DHCP-assigned addresses (which typically start from 192.168.100.2 or higher).

When you assign 192.168.100.200 to your device, you are essentially placing it on the same logical network as your cable modem, allowing direct communication with the modem's management interface. Every other device on your network — laptops, smartphones, smart TVs, gaming consoles — also receives a private IP from this same subnet when connected, though their addresses are usually assigned automatically via DHCP rather than set manually.

Related IP Addresses in the 192.168.100.x Subnet

If you are working within the 192.168.100.0/24 network, you may also encounter the following related IP addresses. Each plays a specific role in the subnet ecosystem:

• 192.168.100.1 — The default gateway and management IP for cable modems from Arris, Motorola, Ubee, Huawei, ZyXEL, and others. This is the address you navigate to in your browser to access the modem's admin or status page.
• 192.168.100.2 — Typically the first DHCP-assigned address in the subnet, often given to the first device that connects to the network after the gateway.
• 192.168.100.100 — A commonly used static IP for servers, NAS devices, or printers within the 192.168.100.x network due to its easy-to-remember format.
• 192.168.100.254 — The last usable host address in the subnet, sometimes used as an alternate management IP or reserved for specific network infrastructure devices.
• 192.168.100.200 — The current address, widely recommended as a static client IP for accessing cable modem management interfaces, as documented by Arris and other manufacturers.

Beyond the 192.168.100.x subnet, other commonly referenced private gateway addresses include 192.168.1.254, 192.168.8.1, 192.168.10.1, and 10.0.0.1.

Frequently Asked Questions About 192.168.100.200

What is 192.168.100.200 used for?

192.168.100.200 is most commonly used as a manually assigned static IP address for a PC or router's WAN port when you need to access a cable modem's management interface. Manufacturers like Arris officially recommend assigning this address to your device so it can communicate with the modem at 192.168.100.1. It can also appear as a DHCP-assigned address for any client device connected to a network running on the 192.168.100.0/24 subnet.

Is 192.168.100.200 a router's default gateway?

No — 192.168.100.200 is not a default gateway address. The default gateway for the 192.168.100.x subnet is 192.168.100.1, which is used by cable modems from Arris, Motorola, Ubee, Huawei, and ZyXEL. The address 192.168.100.200 is a host address within the same subnet, typically assigned to a client device rather than the gateway itself.

Which brands are associated with the 192.168.100.x subnet?

The 192.168.100.x subnet is primarily associated with ISP-provisioned cable modems and DOCSIS gateway devices from Arris, Motorola, Ubee, Huawei, ZyXEL, Ambit Microsystems, Askey, and SmartRG. These manufacturers use 192.168.100.1 as the modem's management IP, placing all connected devices — including any device you assign 192.168.100.200 to — within the same /24 subnet.

Can two devices share the IP 192.168.100.200?

No. Like all IP addresses on a local network, 192.168.100.200 must be unique within the subnet. If two devices are assigned the same address, an IP conflict will occur, causing both devices to lose network connectivity. Always verify that no other device on your 192.168.100.x network is already using 192.168.100.200 before assigning it statically.

How do I find my actual gateway if it is not 192.168.100.1?

Open a command prompt on Windows and type ipconfig /all, then look for the Default Gateway field. On macOS or Linux, run ip route | grep default or netstat -nr. If your gateway is different from 192.168.100.1, your modem or router may be using a different subnet. You can also check our guide to find your router IP address for step-by-step instructions.

Do I need an internet connection to use 192.168.100.200?

No. Because 192.168.100.200 is a private IP address, communication between it and the modem at 192.168.100.1 happens entirely within your local network. You do not need an active internet connection to assign this address to your PC and access the modem's status or diagnostic page — this is one of the key advantages of using a static IP in this subnet.