10.0.0.0/8 is a private range
10.0.0.0/8 is a private range: its 16.7 million addresses only exist inside home, office and provider networks, and websites never see them.
What it means
10.0.0.0/8 is the largest of the three RFC 1918 private ranges, so companies, cloud networks and some home routers use it when they need many internal addresses. A home router that hands out 10.0.0.x addresses usually sits at 10.0.0.1.
RFC 1918 sets aside three ranges (10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16) for networks that are not directly on the internet. Your router hands these out to your phone, laptop and TV, and every home can reuse the same numbers because they are never routed between networks.
When a device with a private address opens a website, the router rewrites the request so it comes from the router’s one public address (network address translation, NAT). That public address is what the Truth Check on our home page shows; the private one stays inside your network.
What to do
- To see the address websites see, open the Truth Check from the same device.
- Your router’s own admin page is usually at the first address in the range, such as 192.168.0.1 or 192.168.1.1 — check the label on the router or its manual.
- A private address on a device does not mean anything is wrong.
Router addresses in this block
10.0.0.1, 10.0.0.138 are common router admin addresses inside this range. Yours is printed on the router or in its manual; you can only reach it from your own network, and we never offer a login page for it.
Want the address websites actually see for you? Open the Truth Check.
Sources
- IANA IPv4 Special-Purpose Address Registry (CC0) · checked 2 Nov 2026
- RFC 1918