192.168.100.4 Admin Login

192.168.100.4 is a Class C private IPv4 address that belongs to the 192.168.100.0/24 subnet — a range widely associated with cable modem-router combos and ISP-supplied gateway devices from brands such as Motorola, ZyXEL, ARRIS, Huawei, TP-Link, and Netgear. While the primary default gateway in this subnet is typically 192.168.100.1, the address 192.168.100.4 is commonly assigned as a static or DHCP-leased IP to a connected device — such as a computer, smart TV, printer, or secondary router — operating within that same local network.

Because 192.168.100.4 sits in the same /24 block as the well-known 192.168.100.1 gateway, you will most often encounter it in homes or small offices where an ISP-provided modem-router combo (particularly DOCSIS cable modems) has been configured to distribute addresses in the 192.168.100.x range. Other common default gateways you may come across include 192.168.1.1, 192.168.0.1, and 10.0.0.1.

How to Access 192.168.100.4

To reach the admin panel at 192.168.100.4, open any web browser on a device that is connected to the same local network and type http://192.168.100.4 directly into the address bar — do not use a search engine. Press Enter and the router or device login page should load within a few seconds. You will then be prompted to enter a username and password. If your device uses the default credentials, these are typically printed on a label on the back or bottom of your router or modem.

Keep in mind that 192.168.100.4 is a private IP address, which means it is only reachable from within your local network. You cannot access it from the internet or from a different Wi-Fi network. If you are trying to manage a router whose gateway is 192.168.100.1, make sure you are typing that address instead — 192.168.100.4 may simply be the IP assigned to one of your connected devices rather than the router itself.

If You Can't Access 192.168.100.4

If typing http://192.168.100.4 into your browser returns an error or a blank page, there are a few things you should check. First, confirm that your device is actually connected to the network where 192.168.100.4 is active — either via Wi-Fi or an Ethernet cable. Next, verify that 192.168.100.4 is the correct address for your device. Open the Command Prompt on Windows (Start > Run > cmd) and type ipconfig /all, then look for the Default Gateway field. On macOS or Linux, open Terminal and run netstat -nr or ip route. If the gateway shown is different — for example 192.168.100.1 or 192.168.1.1 — then you should use that address instead.

Another common reason 192.168.100.4 may be unreachable is a firewall rule blocking access to the admin interface, or the device at that address may have been powered off or reassigned a different IP by the DHCP server. Try restarting your router and reconnecting your device before attempting to access 192.168.100.4 again. You can also check our guide to find your router IP address for more detailed steps.

192.168.100.4 and the 192.168.100.x Subnet

The address 192.168.100.4 is part of the 192.168.100.0/24 subnet, which supports up to 254 usable host addresses ranging from 192.168.100.1 to 192.168.100.254. This particular subnet is heavily associated with cable modem-router combos and ISP-provisioned gateway devices. Brands like Motorola, ARRIS, ZyXEL, and Huawei frequently ship devices that default to the 192.168.100.x range, especially in North American and Asian cable broadband deployments.

Within this subnet, the most commonly used addresses are:

• 192.168.100.1 — The most widely used default gateway in this subnet, found on Motorola, ZyXEL, ARRIS, Huawei, TP-Link, and Netgear cable modem-routers.
• 192.168.100.2 — Often the first DHCP-assigned client address or a secondary device IP.
• 192.168.100.3 — Commonly assigned to a second connected device on the network.
• 192.168.100.4 — Typically the third or fourth DHCP-assigned address, or a manually set static IP for a specific device such as a printer, NAS, or secondary access point.
• 192.168.100.254 — Sometimes used as an alternative gateway address on certain ISP-configured devices.

If your network uses the 192.168.100.x range, you can assign 192.168.100.4 as a static IP to any device you want to reach consistently — for example, a network printer or a home server — so that its address never changes even after a reboot.

Changing Your Router's Password on a 192.168.100.x Network

If your router's gateway is 192.168.100.1 and you want to strengthen your network security, you should change the default admin password as soon as possible. To do this, log in to your router's admin panel by navigating to http://192.168.100.1 in your browser. Once logged in, look for a section labeled Administration, System, or Management — the exact label depends on your router brand. From there, you will find an option to update the admin password.

Choose a strong password that combines uppercase and lowercase letters, numbers, and special characters. Avoid using easily guessable information such as your name, address, or the default password printed on the router label. After saving the new password, you will be logged out and prompted to log back in with your updated credentials. Keeping a strong admin password prevents unauthorized users on your 192.168.100.x network from accessing and modifying your router settings.

Router Username and Password List

Router Brands Associated with the 192.168.100.x Subnet

While 192.168.100.4 itself is not a dedicated default gateway for any single router brand, it lives within the 192.168.100.0/24 subnet that is actively used by several well-known manufacturers. Here is a breakdown of the brands most commonly associated with this IP range and what you need to know about each:

• Motorola — Many Motorola cable modem-routers, particularly DOCSIS 3.0 and 3.1 models, use 192.168.100.1 as their default gateway. If you have a Motorola device and your connected computer receives 192.168.100.4 via DHCP, your gateway is most likely 192.168.100.1. The default login is typically admin / motorola or admin / password.
• ARRIS — ARRIS SURFboard and related cable modem-router combos frequently operate in the 192.168.100.x range. Devices like the ARRIS SBG series assign client IPs starting from 192.168.100.2 upward, meaning 192.168.100.4 would be the third connected device. Default credentials are often admin / password.
• ZyXEL — ZyXEL is one of the few brands that officially lists 192.168.100.1 as one of its default gateway options across multiple product lines. If you are on a ZyXEL network, 192.168.100.4 may be assigned to your PC or another device. Default login is typically admin / 1234 or admin / admin.
• Huawei — Huawei home gateways and ONT (Optical Network Terminal) devices used by ISPs in Asia, Europe, and Africa often operate in the 192.168.100.x subnet. The address 192.168.100.4 may appear as a DHCP-assigned IP on Huawei-managed networks. Default credentials vary by model but are commonly admin / admin or telecomadmin / admintelecom.
• TP-Link — Certain TP-Link modem-router combos and ADSL gateways are configured by ISPs to use the 192.168.100.x range. TP-Link's default admin credentials are typically admin / admin.
• Netgear — Some Netgear cable gateway models, especially those provisioned by cable ISPs, may operate in the 192.168.100.x subnet. Default credentials are usually admin / password.

How to Perform a Factory Reset on Devices in the 192.168.100.x Network

If you have forgotten the admin password for your router or the device at 192.168.100.4 is not responding as expected, a factory reset will restore all settings to their original defaults — including the IP address, username, and password. Here is how to do it for the most common brands in this subnet:

• Motorola / ARRIS — Locate the small Reset button on the back or bottom of the device. Use a paperclip or pin to press and hold it for 10–15 seconds until the lights flash or the device reboots. After the reset, the gateway will return to 192.168.100.1 and the default credentials will be restored.
• ZyXEL — Press and hold the Reset button for approximately 10 seconds. The Power LED will blink during the reset process. Once complete, the device will reboot and return to factory defaults, including the 192.168.100.1 gateway address.
• Huawei — On most Huawei home gateways, hold the Reset button for 10 seconds until all indicator lights turn off and the device restarts. Some Huawei ONT devices may require you to hold the button for up to 20 seconds. After the reset, use the default credentials printed on the device label.
• TP-Link — Press and hold the Reset button for 6–10 seconds until the SYS LED blinks rapidly. The router will reboot automatically. Default credentials are admin / admin.

Important: A factory reset will erase all custom settings, including your Wi-Fi name (SSID), Wi-Fi password, port forwarding rules, and any static IP assignments — including any manual assignment of 192.168.100.4. Make sure to back up your configuration before performing a reset if your router supports it.

Assigning 192.168.100.4 as a Static IP Address

One of the most practical uses of 192.168.100.4 is assigning it as a static (fixed) IP address to a specific device on your network. By default, your router's DHCP server assigns IP addresses dynamically, meaning a device might receive a different address each time it reconnects. Assigning 192.168.100.4 as a static IP ensures that a particular device — such as a network printer, NAS drive, IP camera, or secondary access point — always uses the same address.

There are two ways to assign a static IP of 192.168.100.4:

• Via the router's admin panel (DHCP reservation) — Log in to your router at http://192.168.100.1, navigate to the DHCP or LAN settings, and look for an option called Address Reservation, Static DHCP, or DHCP Binding. Enter the MAC address of the device you want to assign 192.168.100.4 to, and save the setting. The router will always give that device the same IP.
• Directly on the device — On Windows, go to Control Panel > Network and Sharing Center > Change adapter settings, right-click your network adapter, select Properties, then Internet Protocol Version 4 (TCP/IPv4), and manually enter 192.168.100.4 as the IP address, 255.255.255.0 as the subnet mask, and 192.168.100.1 as the default gateway.

Before assigning 192.168.100.4 statically, always check your router's DHCP pool to make sure this address is not already in use by another device, which would cause an IP address conflict.

What Is a Private IP Address Like 192.168.100.4?

192.168.100.4 is a private IPv4 address, which means it is reserved exclusively for use within local networks and is never routed over the public internet. Private IP addresses fall into three defined ranges established by RFC 1918: 10.0.0.0–10.255.255.255, 172.16.0.0–172.31.255.255, and 192.168.0.0–192.168.255.255. As a 192.168.x.x address, 192.168.100.4 belongs to the Class C private range.

Every device connected to your home or office network receives a private IP address from the router's DHCP server. For example, if your router operates in the 192.168.100.x range, your connected devices might be assigned addresses like this:

• Your laptop receives 192.168.100.2
• Your smartphone receives 192.168.100.3
• Your smart TV receives 192.168.100.4
• Your tablet receives 192.168.100.5

These private addresses allow your router to direct internet traffic to the correct device. When you request a webpage, your device sends the request to the router using its private IP. The router then forwards the request to the internet using your public IP address (assigned by your ISP), receives the response, and routes it back to the correct private IP — in this case, 192.168.100.4. This process is called Network Address Translation (NAT) and is fundamental to how modern home networks operate.

Other commonly used private gateway addresses you may encounter include 192.168.1.1, 192.168.0.1, 192.168.2.1, 10.0.0.1, 192.168.1.254, 192.168.8.1, and 192.168.10.1.

Frequently Asked Questions About 192.168.100.4

Is 192.168.100.4 a router's default gateway?

Not typically. 192.168.100.4 is most commonly a DHCP-assigned client IP or a manually configured static address within the 192.168.100.0/24 subnet. The default gateway in this subnet is usually 192.168.100.1, which is used by brands like Motorola, ARRIS, ZyXEL, Huawei, TP-Link, and Netgear. However, some network administrators do configure 192.168.100.4 as a gateway on custom or enterprise setups.

Why does my device show 192.168.100.4 as its IP address?

Your router's DHCP server has automatically assigned 192.168.100.4 to your device. This typically happens when you are connected to a network managed by a Motorola, ARRIS, ZyXEL, or Huawei cable modem-router that uses the 192.168.100.x range. The fourth address in the pool (192.168.100.4) is assigned to the third device that connected to the network after the gateway itself.

Can I use 192.168.100.4 to log in to my router?

Only if your router has been specifically configured to use 192.168.100.4 as its management IP. In most cases, you should try 192.168.100.1 to access your router's admin panel. To confirm your actual gateway address, run ipconfig /all on Windows or ip route on Linux/macOS and look for the Default Gateway value.

What should I do if there is an IP conflict at 192.168.100.4?

An IP conflict at 192.168.100.4 means two devices on your network have been assigned the same address. To resolve this, log in to your router at 192.168.100.1 and check the DHCP client list. Identify which devices are using 192.168.100.4 and either release one device's IP (by disconnecting and reconnecting it) or set up a DHCP reservation to permanently assign 192.168.100.4 to only one specific device by its MAC address.

Which router brands use the 192.168.100.x subnet?

The 192.168.100.x subnet is most commonly associated with Motorola, ARRIS, ZyXEL, Huawei, TP-Link, and Netgear cable modem-router combos and ISP-provisioned gateway devices. These brands often use 192.168.100.1 as the default gateway, with client devices like your computer or phone receiving addresses such as 192.168.100.2, 192.168.100.3, or 192.168.100.4 via DHCP.

How do I find out if 192.168.100.4 is in use on my network?

You can ping 192.168.100.4 from the command line by typing ping 192.168.100.4. If you receive a reply, the address is currently in use by a device on your network. You can also log in to your router's admin panel at 192.168.100.1 and check the DHCP Client List or Connected Devices section to see which device holds the 192.168.100.4 address.