IP address and network guides
Clear answers to common questions about IP addresses and home networks, with step-by-step instructions for each device. Pick a topic below.
What Is My IP Address? Meaning and How to CheckWhat an IP address is, how your public IP differs from a private one, why it changes, and the fastest ways to check it, explained with simple examples.Public IP vs Private IP: What Is the Difference?A public IP is the one address your provider assigns to your line, while a private IP only works inside your router. Here is how they differ and how to check each one.IPv4 vs IPv6: What Is the Difference?How IPv4 and IPv6 address formats differ, why IPv6 adoption keeps growing, and why both are often used together, explained with real address examples.Dynamic IP vs Static IP: The DifferenceA dynamic IP changes from time to time while a static IP always stays the same. Learn when each one is used and how to request or change one.What Is an ASN (Autonomous System Number)?What an ASN is, why every provider has its own number, and how to check the ASN behind your connection directly on ipnow.kr, with real examples.What Is CGNAT? Meaning and ImpactWhat Carrier-Grade NAT is, why providers use it to save IPv4 addresses, how to tell if your connection uses it, and what problems it can cause.What Is localhost and 127.0.0.1?Why 127.0.0.1 and localhost always point back to your own computer, how they differ from a private IP, and where they are actually used.How to Find Your IP Address on WindowsCheck your private IP through Windows 11 Settings and the Command Prompt, then confirm your public IP instantly on ipnow.kr, step by step.How to Find Your IP Address on a MacCheck your private IP through macOS System Settings and Terminal, then confirm your public IP on ipnow.kr, with clear step-by-step instructions.How to Find Your IP Address on iPhoneHow to check your IP address in iPhone Wi-Fi settings, how to see your public IP on cellular data, and why the two addresses differ.How to Find Your IP Address on AndroidHow to check your Wi-Fi IP address on Samsung Galaxy and Google Pixel phones, and why the menu location differs by maker and version.How to Find Your Router IP AddressHow to find your router admin IP at home or the office, plus the commands to check the default gateway on Windows, Mac, iPhone and Android.How to Check if Your VPN Is Actually WorkingHow to compare your IP and location on ipnow.kr before and after turning on a VPN, plus what DNS leaks and WebRTC internal IP exposure mean.Why Your IP Address Shows the Wrong LocationWhy the location shown by an IP address can differ from where you actually are, why it is only accurate to a city, and how VPNs change it.What Is DNS and How Does It Work?How DNS translates domain names into IP addresses, how to check which DNS server you are using, and how public DNS differs from your ISP's DNS.How to Change Your DNS Server on Any DeviceStep-by-step instructions for changing your DNS server on Windows 11, macOS, iPhone, Android Private DNS, and directly on your router.What Is a User-Agent String?What information a browser's User-Agent string sends to websites, what it is used for, and why it is being reduced in favor of Client Hints.How to Look Up Your IP with curl and the APIHow to fetch your public IP and location or ISP details from ipnow.kr automatically using curl, PowerShell, and the JSON API, with examples.