192.168.100.1 Router Admin Login

192.168.100.1 is the default IP address for cable modems and ISP-supplied gateways from Motorola, Arris, Ubee, and Huawei. Unlike retail routers that use 192.168.0.1 or 192.168.1.1, ISP equipment uses the 192.168.100.0/24 subnet to separate modem management from the local network. This address gives you access to signal diagnostics, firmware information, and bridge mode configuration.

How to Login to 192.168.100.1

Connect to the modem directly. Use an Ethernet cable from your computer to one of the modem’s Ethernet ports. If the modem is in bridge mode and connected to a separate router, you may need to bypass the router and connect straight to the modem.

Open a browser and type 192.168.100.1 in the address bar. Motorola cable modems (MB8600, MB7621, MB7420) show a clean white interface with the Motorola logo. The login prompt asks for a username and password.

Arris gateways (SBG6580, SBG7600, TG1682G) display a tabbed interface with sections for Status, Basic, Advanced, and Firewall. ISP-branded Arris units may show the provider’s logo instead of the Arris branding.

Huawei LTE modems (B315, B525, B593) present the familiar Huawei admin panel at this address when configured by certain ISPs. The standard Huawei gateway is 192.168.8.1, but some carriers override it to 192.168.100.1.

If the page does not load, you may need a static IP address. Set your computer’s network adapter to 192.168.100.2 with a subnet mask of 255.255.255.0. This places your computer on the same subnet as the modem. For detailed steps, see the router login guide.

Default Credentials

Cable modems and ISP gateways ship with different default passwords depending on the manufacturer. Here are the most common credentials for devices at this IP address:

Device	Username	Password
Motorola MB8600	admin	motorola
Motorola MB7621	admin	motorola
Motorola MB7420	admin	motorola
Arris SBG6580	admin	password
Arris SBG7600	admin	password
Arris TG1682G	admin	password
Ubee DVW32CB	user	user
Ubee DDW365	admin	admin
Huawei B315	admin	admin

Motorola consistently uses admin/motorola across its entire cable modem line. Arris defaults to admin/password on most models, though ISPs sometimes change this during provisioning. Ubee devices vary depending on the ISP.

If none of these work, the ISP likely set a custom password. Contact your provider before factory resetting, since a reset can require re-provisioning.

Routers Using This IP

This gateway address is almost exclusively found on ISP-supplied equipment rather than retail routers.

Motorola cable modems are the most common retail devices here. The MB8600 (DOCSIS 3.1) and MB7621 (DOCSIS 3.0) are popular with customers who buy their own modem to avoid ISP rental fees.

Arris manufactures modems for Comcast Xfinity, Spectrum, and Cox. The TG1682G is a widely deployed Xfinity gateway. The SBG6580 and SBG7600 are combo modem-routers sold at retail.

Ubee produces cable gateways for ISPs in North and South America. The DVW32CB is common on smaller regional cable networks.

Huawei LTE modems appear at this address when ISPs in Africa, the Middle East, and parts of Asia configure them on the 192.168.100.0/24 subnet instead of Huawei’s standard 192.168.8.1.

Troubleshooting

1. Page does not load at all. The management interface may not be reachable from behind your router. Plug your computer directly into the modem via Ethernet. Set a static IP of 192.168.100.2, then try again.

2. “admin/motorola” does not work. If the modem was previously owned, someone changed the password. Factory reset by holding the reset button for 15 seconds. The modem needs 5 to 10 minutes to re-establish its ISP connection.

3. Admin panel loads but settings are locked. ISP-provisioned modems often restrict access to diagnostic pages only. You can view signal levels and connection status, but cannot change firewall settings. This is normal for ISP-locked equipment.

4. Modem shows “Offline” or no signal levels. Check the coaxial cable connection. A loose coax fitting is the most common cause. Hand-tighten the connector at both the modem and the wall plate.

5. Cannot reach the gateway after enabling bridge mode. Bridge mode disables the routing function. Assign a static IP of 192.168.100.2 on your computer and go to the gateway directly.

6. Searching for “192.168 l00 1” does not work. A common search query is 192.168 l00 1 where users type the letter L followed by two zeros instead of the number 100. Browsers cannot resolve letters in an IP address. The correct address uses the number one (1), zero (0), zero (0), not the lowercase letter L (l) followed by two zeros. Type exactly 192.168.100.1 in the address bar to reach the admin panel.

This IP vs Other Gateways

192.168.100.1 serves a different purpose than typical home router addresses. While 192.168.0.1 and 192.168.1.1 are router gateways for your local network, this address is a modem management interface. The distinction matters because modems and routers handle different layers of your connection.

The modem connects to your ISP over the WAN side, converting the cable or LTE signal into Ethernet. The router takes that connection and creates your local LAN with Wi-Fi and wired ports. When both functions live in a single device, the admin panel controls everything. When they are separate, this address manages only the modem.

Cable modems at this address show diagnostic data that routers do not: downstream and upstream power levels, signal-to-noise ratio, channel bonding status, and DOCSIS version. These numbers help diagnose slow internet before calling the ISP.

The 192.168.100.0/24 subnet was chosen to stay out of the way. Since no major retail router brand defaults to this range, a modem here and a router at 192.168.1.1 never collide. This is an intentional design decision across the cable modem industry.