Your network, made clear.
See the public address your connection presents to the internet, understand what it means, and get practical tools to make your network faster, safer, and easier to troubleshoot.
Geolocation is derived from public network-registration data and may be wrong, especially on mobile networks or VPNs.
Useful answers, not a wall of diagnostics.
Start with the task you actually want to finish. Each path combines a focused tool with a plain-English explanation.
Check an open port
Confirm whether a public-facing web, game, mail, or remote-access port is reachable.
02Calculate a subnet
Turn an IPv4 address and CIDR prefix into its network, mask, broadcast, and usable range.
03Find what is slow
Separate a Wi-Fi problem from an ISP, DNS, device, or application problem in a few tests.
Skip the “secret registry tweak” rabbit hole.
Most Windows network gains come from finding the actual bottleneck, keeping adapter drivers healthy, protecting Wi-Fi signal quality, and controlling background traffic.
Build the mental model once.
Public, private, static, dynamic
The four distinctions that explain most IP-address questions.
DNSHow names become addresses
Resolvers, records, caching, and what changing DNS can—and cannot—fix.
PerformanceBandwidth vs. latency vs. loss
Three different measurements that produce three different kinds of “slow.”
PortsWhat “open” really means
A service accepted a connection. Here is what to check next.
Advice with guardrails.
A faster-looking setting can reduce stability, power efficiency, or security. We call that out.
Observe first, change one thing, retest, and know how to undo it.
Windows-specific recommendations link back to Microsoft documentation where practical.
IP address FAQ
Is this my public or private IP address?
The address shown here is the public IP visible to this web server. Your router normally gives devices separate private addresses used only inside your local network.
Can an IP address reveal my exact location?
No. IP geolocation is an estimate that may identify a city, region, or ISP, but it does not provide a reliable home address or identify a specific person.
Why does my public IP change?
Many internet providers assign dynamic addresses that can change after a lease renewal, modem restart, or network change. A static address is usually an optional service.
Does a VPN change the IP websites see?
Usually. When a VPN tunnel is active, websites normally see the VPN exit server address instead of the public address assigned by your internet provider.