⚡ Private Gateway IP Pillar
192.168.100.1 Admin Login & Setup Guide
Standard diagnostic IP for DOCSIS cable modems and fiber optical network terminals (ONTs) in bridge/passthrough mode.
RFC 1918 Private IPv4 Reference
Gateway IP: 192.168.100.1 • Subnet: 255.255.255.0 (/24)
Default Credentials: admin / admin (or TelecomAdmin) • Usable Hosts: 192.168.100.2 - 192.168.100.254
Subnet Parameters & Range Allocation
Address Class
Class C Private (192.168.0.0/16)
Subnet Mask
255.255.255.0 (/24)
Common Brands
Huawei ONT, Motorola & Arris Cable Modems, Virgin Media Modem Mode
Usable Host Range
192.168.100.2 - 192.168.100.254
Routers Configured on 192.168.100.1
| Model Name | Username | Password | Action |
|---|---|---|---|
| Arris SURFboard SB8200 DOCSIS 3.1 | admin |
password (or last 8 digits of serial number) |
Setup Sheet → |
⚡ Live Gateway Reachability Probe
Test whether your current device can reach 192.168.100.1 across your local network:
Why is 192.168.100.1 Not Loading?
- Typo check: Ensure you are typing numbers, not letters (avoid "192.168.l.l" with lowercase L).
- VPN Active: Disconnect any active VPNs (Work VPN, NordVPN, ExpressVPN) as they route DNS away from your local subnet.
- Protocol: Use
http://192.168.100.1rather thanhttps://unless your router enforces SSL certificates. - Different Gateway: Your router might use a different subnet. Use our Local Gateway Auto-Detector to confirm your exact IP.