by Tommy N. Updated Apr 12, 2026
The IP address 192.168.100.100 is a private network address commonly used by fiber optic ONT (Optical Network Terminal) and modem devices from ZTE and Huawei. This IP is frequently encountered when users need to access their fiber modem's management interface, especially when the modem operates behind a separate WiFi router. If your ISP installed a fiber ONT, you can often reach its settings page at 192.168.100.100.
LOGIN TO 192.168.100.100 ADMIN PANEL
If 192.168.100.100 doesn't work, your fiber ONT may use a different address. Try 192.168.1.1 or 192.168.0.1. Note that 192.168.100.100 is typically for the modem/ONT, not your WiFi router — your router likely uses a different IP for its admin panel.
Fiber ONTs and modems using 192.168.100.100 come with ISP-configured credentials that vary by manufacturer and provider:
| Brand / Device | Username | Password |
|---|---|---|
| Huawei HG8245H/HG8546M | telecomadmin | admintelecom |
| Huawei ONT (alternate) | admin | admin |
| ZTE Fiber ONT | admin | admin |
| ZTE ONT (ISP-set) | user | user |
| Generic Fiber Modem | admin | password |
| ISP Super Admin | telecomadmin | admintelecom |
Accessing the fiber ONT admin panel at 192.168.100.100 requires some specific steps, especially if the ONT is behind a separate router:
http://192.168.100.100 in your browser's address bar and press Enter. The Huawei or ZTE admin login page should appear. If the page doesn't load, try disabling your firewall temporarily or using a different browser.If you're connecting through a WiFi router (rather than directly to the ONT), the router may be blocking access to the ONT's subnet. Connect your computer directly to the ONT via Ethernet, or add a static route on your router to reach the 192.168.100.0/24 network. See our Find Router IP Address guide for more help.
If your fiber ONT has built-in WiFi (like the Huawei HG8245H), you can change the WiFi name and password, configure dual-band settings, and set up a guest WiFi network. If you're using a separate WiFi router behind the ONT, the ONT's WiFi settings may not be relevant — you'd manage WiFi on your router instead.
Change the admin password from the default to prevent unauthorized access. The telecomadmin account has full control over the ONT, so securing it is critical. You can also set up MAC address filtering and block unwanted devices if the ONT handles WiFi directly.
Fiber ONTs offer advanced settings including bridge mode configuration, VLAN tagging, port forwarding, VPN passthrough, and DDNS setup. One of the most common tasks is switching the ONT from router mode to bridge mode, which lets your own router handle all routing and NAT functions.
Check the ONT's optical signal levels (Rx power) to diagnose fiber connection issues. Update firmware when your ISP pushes new versions (ONT firmware is often managed remotely by the ISP via TR-069). Monitor connected devices and review system logs. If you encounter persistent problems, you may need to reset the ONT to factory defaults.
| Common Typo | Correct IP |
|---|---|
| 192.168.100.10 | 192.168.100.100 |
| 192.168.100.1 | 192.168.100.100 |
| 192.168.1.100 | 192.168.100.100 |
| 192.168.100100 | 192.168.100.100 |
| http//192.168.100.100 | http://192.168.100.100 |
| 192.168.100.100.com | 192.168.100.100 |
| www.192.168.100.100 | 192.168.100.100 |
| 192.168.l00.100 | 192.168.100.100 |
One of the most important concepts to understand about 192.168.100.100 is the "modem behind router" topology. In many fiber internet installations, the ISP installs a fiber ONT (modem) and a separate WiFi router. The network looks like this:
Internet → Fiber ONT (192.168.100.100) → WiFi Router (192.168.1.1) → Your Devices
In this setup, the ONT handles the fiber-to-Ethernet conversion and operates on the 192.168.100.x subnet, while your WiFi router creates a separate 192.168.1.x subnet for your devices. Because these are different subnets, your devices can't normally access the ONT's admin panel at 192.168.100.100.
To access the ONT, you have three options: (1) connect a computer directly to the ONT via Ethernet, bypassing your router; (2) add a static route on your WiFi router pointing the 192.168.100.0/24 network to the ONT; or (3) configure your computer with a secondary IP address in the 192.168.100.x range.
Huawei ONTs like the HG8245H, HG8245H5, and HG8546M are among the most commonly deployed fiber terminals worldwide. These devices support GPON or XG-PON technology and often include built-in WiFi, multiple Ethernet ports, phone ports for VoIP, and a USB port. The telecomadmin/admintelecom credential pair provides ISP-level access to all settings.
ZTE fiber ONTs are equally popular, used by ISPs across Asia, Europe, Africa, and Latin America. ZTE models like the F660, F670L, and ZXHN series are commonly configured with 192.168.100.100 as the management IP. ZTE ONTs typically use admin/admin or user/user as default credentials.
192.168.100.100 is a private IPv4 address within the range specified by RFC 1918. The three private address ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. Unlike most router gateway IPs that end in .1, this address uses .100, which indicates it's not a typical gateway — it's a management IP for a device operating on a separate subnet from your main network.
ISPs deliberately choose the 192.168.100.x subnet for their ONTs to keep the modem's management network separate from the customer's home network. This prevents IP conflicts and adds a layer of separation between the ISP-managed device and the customer's network equipment.
| IP Address | Common Usage | Typical Brands |
|---|---|---|
| 192.168.100.100 | Fiber ONT/modem management | Huawei, ZTE |
| 10.0.0.1 | Cable ISP gateways | Xfinity, AT&T |
| 192.168.0.1 | Consumer routers | D-Link, Netgear, TP-Link |
| 192.168.1.1 | Most home routers | Linksys, ASUS, TP-Link |
| 192.168.1.254 | ISP modems | BT, Thomson |
Watch this video for a walkthrough on accessing your fiber ONT admin panel:
Pro Tip: Before making changes to your fiber ONT at 192.168.100.100, take screenshots of all current settings pages. ONT firmware updates (often pushed remotely by your ISP) can reset your customizations. Having screenshots makes it easy to reconfigure everything. Also, note your optical signal Rx power value — if it's weaker than -25 dBm, contact your ISP as the fiber connection may need attention.
192.168.100.100 is the management IP address for fiber optic ONT (Optical Network Terminal) devices, primarily from Huawei and ZTE. It provides access to the modem's admin panel where you can view fiber connection status, configure network settings, and manage WiFi if the ONT has built-in wireless.
Connect your computer directly to the fiber ONT via Ethernet cable, open a browser, and type http://192.168.100.100. If you can't reach it through your WiFi router, you may need to set a static IP on your computer (e.g., 192.168.100.50) to be on the same subnet as the ONT.
The most common credentials for Huawei fiber ONTs are telecomadmin/admintelecom (ISP super-admin) or admin/admin (standard user). The telecomadmin account provides full access to all settings including bridge mode and VLAN configuration.
Your WiFi router and the fiber ONT are on different subnets (e.g., 192.168.1.x vs 192.168.100.x). Your router doesn't automatically route traffic between these subnets. Connect directly to the ONT via Ethernet, or add a static route on your router to reach the 192.168.100.0/24 network.
A fiber ONT converts the optical fiber signal into an electrical Ethernet signal — it's essentially a modem for fiber internet. A WiFi router creates your wireless network and handles traffic routing for your devices. Some ONTs have built-in WiFi (combo devices), but many setups use separate ONT and router devices.
Log into 192.168.100.100 with the telecomadmin/admintelecom credentials, navigate to WAN settings, and change the connection type from "Route" to "Bridge." This disables the ONT's routing and NAT functions, letting your own router handle everything. Save and reboot the ONT. Note: improper bridge mode settings can cause internet disconnection.
Yes, ISPs can remotely manage and monitor their ONT devices through TR-069 (CWMP) protocol. They can push firmware updates, change settings, and view device status remotely. However, they typically don't monitor your browsing activity through the ONT. For privacy, use your own router behind the ONT and consider a VPN.
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About Tommy N.
Tommy is the founder of RouterHax and a network engineer with over ten years of experience in home and enterprise networking. He has configured and troubleshot networks ranging from simple home setups to multi-site enterprise deployments, with deep hands-on experience in router configuration, WiFi optimization, and network security. At RouterHax, he oversees editorial direction and covers home networking guides, mesh WiFi system reviews, and practical troubleshooting resources for everyday users.
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