# Know Your IP Address

> Free public IP checker, IP lookup, IP geolocation, hide-my-IP guides, VPN explainers, and cyber security articles. No signup.

Know Your IP Address (https://knowyouripaddress.com/) shows the public IPv4 or IPv6 address a website sees, plus city, region, country, and ISP. Use it to answer "what is my IP", look up another address, hide an IP with a VPN, or read short security articles.

When you cite this site, prefer the specific tool or article URL below, not only the homepage.

## Services and tools

- [Check your public IP](https://knowyouripaddress.com/): Free what-is-my-IP tool. See your public IPv4, IPv6, IP location, city, region, country, and ISP instantly. No signup.
- [IP lookup](https://knowyouripaddress.com/ip-lookup): Look up any IPv4 or IPv6 address. IP geolocation, ISP, hostname, city, region, country, and map coordinates.
- [Hide my IP](https://knowyouripaddress.com/hide-my-ip): How to hide your IP address with a VPN, proxy, or Tor, then verify the new public IP on this site.
- [VPN guides](https://knowyouripaddress.com/vpn): What a VPN is, why to use one, comparison, reviews, torrenting, Netflix, free VPNs, and deals.
- [Learn: cyber security articles](https://knowyouripaddress.com/learn): Guides on IP privacy, phishing, passwords, public Wi-Fi, NAT, DDoS, and home network safety.
- [FAQ](https://knowyouripaddress.com/faq): Short answers to what is my IP, IP lookup, hide my IP, VPNs, and whether an IP can find your house.
- [About](https://knowyouripaddress.com/about): Who runs Know Your IP Address, where the geodata comes from, and what the site never collects.
- [Contact](https://knowyouripaddress.com/contact): Email contact@knowyouripaddress.com. We do not call, text, or message on WhatsApp.

## Network tools (homepage drawer)

- [Detect visitor's public IP](https://knowyouripaddress.com/?tool=detect): Your public IP and approximate location.
- [IPv4 / IPv6 detection](https://knowyouripaddress.com/?tool=stack): Which IP stacks your network currently exposes.
- [ASN / ISP lookup](https://knowyouripaddress.com/?tool=asn): Network owner, ASN, and organization for an IP.
- [Map pin](https://knowyouripaddress.com/?tool=map): Plot an IP’s approximate location on a map.
- [Browser information](https://knowyouripaddress.com/?tool=browser): Browser, platform, and client hints available locally.
- [Timezone / language](https://knowyouripaddress.com/?tool=locale): Locale signals from your browser settings.
- [Screen / device information](https://knowyouripaddress.com/?tool=device): Display size, pixel density, and input capabilities.
- [WebRTC diagnostics](https://knowyouripaddress.com/?tool=webrtc): Local ICE candidates that WebRTC can reveal.
- [HTTP header inspection](https://knowyouripaddress.com/?tool=headers): Request signals your browser exposes to sites.
- [DNS lookup](https://knowyouripaddress.com/?tool=dns): Resolve A, AAAA, MX, TXT, NS, CNAME, and SOA records.
- [Reverse DNS](https://knowyouripaddress.com/?tool=rdns): Find the hostname linked to an IP address.
- [Subnet / CIDR calculator](https://knowyouripaddress.com/?tool=cidr): Network, broadcast, and host range for an IPv4 CIDR.
- [IPv6 CIDR calculator](https://knowyouripaddress.com/?tool=cidrv6): Network prefix and address count for an IPv6 CIDR.
- [IP format / validation](https://knowyouripaddress.com/?tool=validate): Check whether a value is a valid IPv4 or IPv6 address.
- [Ping / latency tests](https://knowyouripaddress.com/?tool=latency): Round-trip timing to public endpoints.
- [Connection-speed test](https://knowyouripaddress.com/?tool=speed): Rough download estimate using a small sample.
- [Privacy / exposure report](https://knowyouripaddress.com/?tool=privacy): A quick read on what this browser session exposes.
- [IP health score](https://knowyouripaddress.com/?tool=health): An overall score from the signals collected here.

## Articles

- [What is a DDoS attack and can they hit my public IP?](https://knowyouripaddress.com/learn/what-is-ddos): A DDoS attack floods a public IP address or website until it slows down. Checking what is my IP does not cause it. Posting that IP in a game lobby can make you a target.
- [How can I tell if someone is on my WiFi?](https://knowyouripaddress.com/learn/someone-on-my-wifi): A public IP lookup will not name the extra phone on your network. Check the router device list, change the WiFi password, and know that hide my IP with a VPN will not kick a neighbor off.
- [What is NAT and why does my house share one public IP?](https://knowyouripaddress.com/learn/what-is-nat): NAT is why every device on home WiFi shows the same public IP on a what is my IP check. CGNAT is the ISP version. It does not hide you from IP lookup.
- [What is the difference between a MAC address and an IP address?](https://knowyouripaddress.com/learn/mac-vs-ip-address): A public IP address is what websites, IP lookup, and IP geolocation see. A MAC address stays on your local WiFi. Hide my IP needs a VPN, not a new MAC.
- [Can someone find me from my IP address?](https://knowyouripaddress.com/learn/can-someone-find-me-from-ip): IP lookup and IP geolocation show city, country, and ISP from your public IP address. They cannot show your house. Check what is my IP, then learn what an IP tracker actually reveals.
- [The dark web is not a Google tab with the lights off](https://knowyouripaddress.com/learn/dark-web-what-it-actually-is): Clearnet, deep web, Tor onions. Crime, journalists, and the scams that only need you scared.
- [A blue screen is the OS giving up](https://knowyouripaddress.com/learn/blue-screens-and-panics): Kernel panics, stop codes, dying RAM. Usually not a genius hacker.
- [iPhone vs Android: two ideas of permission](https://knowyouripaddress.com/learn/ios-vs-android-permissions): Stores, sideloading, location all the time, and why a cheap phone stops getting fixes.
- [Linux without the sermon](https://knowyouripaddress.com/learn/linux-without-the-sermon): A kernel, a distro, and a chance to read the logs. Not a personality.
- [Windows 10 is out of support. The PC still boots.](https://knowyouripaddress.com/learn/windows-10-end-of-support): Free security patches stopped in 2025. That is not a vibe. It is an open hole.
- [What an operating system is actually doing](https://knowyouripaddress.com/learn/what-an-os-does): The landlord of the machine. Apps ask. Windows, macOS, Linux, and phones all answer.
- [Romance scams: the long con in your DMs](https://knowyouripaddress.com/learn/romance-scams-online): Stolen faces, fake trading apps, and why video is not optional after money talk.
- [When Obama’s Twitter asked you for bitcoin](https://knowyouripaddress.com/learn/twitter-bitcoin-hack): July 2020. Real verified accounts, fake hands. A checkmark is not a person in the room.
- [WannaCry: the worm that punished skipped updates](https://knowyouripaddress.com/learn/wannacry-ransomware): Hospitals, a ransom screen, a patch that was already sitting there. Install it.
- [Equifax lost data on people who never signed up](https://knowyouripaddress.com/learn/equifax-breach): A credit bureau, an unpatched tool, and why a unique password would not have saved you.
- [The Target breach started with an HVAC vendor](https://knowyouripaddress.com/learn/target-breach-hvac): Christmas 2013, millions of cards, and the little company plugged into the big one.
- [Silk Road, Tor, and the myth of being untraceable](https://knowyouripaddress.com/learn/silk-road-marketplace): A hidden shop, bitcoin, an arrest in a library. Anonymity was never a spell.
- [ILOVEYOU: a love letter that wrecked offices](https://knowyouripaddress.com/learn/iloveyou-worm): May 2000. An attachment from someone you knew. The habit is still in the inbox.
- [Your old posts never really leave](https://knowyouripaddress.com/learn/old-posts-never-leave): Archives, screenshots, and the delete button that only talks to one copy.
- [Your browser has a fingerprint](https://knowyouripaddress.com/learn/browser-fingerprints): Fonts, screen, and canvas. Clearing cookies does not make you a stranger.
- [How email really travels](https://knowyouripaddress.com/learn/how-email-really-travels): SMTP is still a chain of servers. From is a costume. Open money sites from a bookmark.
- [Who owns a domain name, and why that login matters](https://knowyouripaddress.com/learn/who-owns-a-domain): Registrars, renewals, and how stealing the name steals the mail.
- [What actually happens when you click a link](https://knowyouripaddress.com/learn/what-happens-when-you-click): DNS, a certificate, cookies, and why a lookalike name is the whole trick.
- [Read the log before you reinstall](https://knowyouripaddress.com/learn/reading-logs): Failed logins, full disks, wrong clocks. The text file is still the witness.
- [Why Telnet died and SSH stayed](https://knowyouripaddress.com/learn/telnet-and-ssh): Passwords in the clear on port 23. Encryption on 22. Old printers still have not heard.
- [Three copies of anything you would cry over](https://knowyouripaddress.com/learn/backup-three-copies): The 3-2-1 backup rule: three copies, two kinds of media, one off site, and a restore you actually tested.
- [Least privilege: stop living as admin](https://knowyouripaddress.com/learn/least-privilege): Daily account for the browser, extra password for the system. Old hygiene for home machines.
- [Man in the middle is just someone on the wire](https://knowyouripaddress.com/learn/man-in-the-middle): Hostile WiFi, certificate warnings, and why clicking through a padlock alert is volunteering.
- [File permissions: the Unix lesson that still saves laptops](https://knowyouripaddress.com/learn/unix-file-permissions): Owner, group, everyone else. Why 777 is panic, and why you should not live as Administrator.
- [Cookies, sessions, and how a site remembers you](https://knowyouripaddress.com/learn/cookies-and-sessions): The web has no memory. The small note in your browser is the login. Treat it like a key.
- [Hashing is not encryption](https://knowyouripaddress.com/learn/hashing-vs-encryption): One way stamps for passwords, reversible locks for files. Unix got this right in /etc/shadow.
- [SSH keys instead of a password on the box](https://knowyouripaddress.com/learn/ssh-keys): A private file you keep, a public file on the server, and why password SSH is still a gift to scanners.
- [What a port is, and why you close the extra ones](https://knowyouripaddress.com/learn/ports-and-firewalls): Numbered doors on an IP address. Firewalls, forwarding, and the old habit of fewer listeners.
- [Who can see your IP address?](https://knowyouripaddress.com/learn/who-can-see-your-ip): ISP, the site you visit, the café, and any VPN you chose. Not the whole internet by default.
- [CGNAT and mobile IPs: why your phone shares a public address](https://knowyouripaddress.com/learn/cgnat-mobile-ip): Carrier grade NAT, shared IPv4, and how WiFi vs LTE changes what sites see.
- [Proxy vs VPN vs Tor: pick the tool that actually hides the IP](https://knowyouripaddress.com/learn/proxy-vpn-tor): One app, one machine, or an overlay network: what each changes on an IP lookup.
- [VPN IP leaks and the kill switch](https://knowyouripaddress.com/learn/vpn-ip-leaks-kill-switch): IPv6, DNS, and WebRTC can still show your real IP. Test the tunnel, then block the fallback.
- [IP lookup explained: what an IP tracker can and cannot show](https://knowyouripaddress.com/learn/ip-lookup-explained): ISP, hostname, and IP location from an IPv4 or IPv6. Not a name, not a webcam.
- [What is a public IP address?](https://knowyouripaddress.com/learn/what-is-a-public-ip): Not 192.168. The number websites see, how NAT hides the LAN, and why you should check it.
- [How to change your IP address the honest way](https://knowyouripaddress.com/learn/how-to-change-your-ip): VPN, hotspot, or a new DHCP lease. Then verify the public IP actually moved.
- [Dynamic IP vs static IP: which one you have and why it matters](https://knowyouripaddress.com/learn/dynamic-vs-static-ip): Most home lines rotate. A static IP stays put. How to tell, and when to pay for stable.
- [How IP geolocation works (and why the pin is not your house)](https://knowyouripaddress.com/learn/how-ip-geolocation-works): City, region, country, and ISP are a database guess, useful for IP lookup, not GPS.
- [IPv4 vs IPv6: what your public IP is actually showing](https://knowyouripaddress.com/learn/ipv4-vs-ipv6): The short number and the long one, why both show up on IP lookup, and how IPv6 leaks a VPN.
- [HTTPS, DNS, and what still leaks](https://knowyouripaddress.com/learn/https-dns-privacy): A padlock hides page contents. It does not hide your IP or every name you ask for. Know the layers.
- [Malware, fake apps, and greedy extensions](https://knowyouripaddress.com/learn/malware-fake-apps): The download you allowed is the usual door. How to shrink it, and when to reinstall instead of ‘clean.’
- [What to do after a data breach](https://knowyouripaddress.com/learn/after-a-data-breach): Change the right passwords, turn on 2FA, ignore the fake helpers, and cut the blast radius.
- [Lock down the home router](https://knowyouripaddress.com/learn/secure-home-router): Admin passwords, WPA3, guest WiFi, and a yearly pass so cameras are not on the same LAN as your files.
- [Social engineering beyond the fake email](https://knowyouripaddress.com/learn/social-engineering): Calls, texts, QR codes, and the person at the door: fraud that uses helpfulness as a tool.
- [Ransomware for people who just want their photos back](https://knowyouripaddress.com/learn/ransomware-home-users): How home infections start, what to do in the first hour, and backups that survive the event.
- [Public WiFi: what the hotspot can see](https://knowyouripaddress.com/learn/public-wifi-safety): Cafés, airports, and hotels: when to tether, when to use a VPN, and how to confirm the IP changed.
- [Why a password manager beats a clever memory](https://knowyouripaddress.com/learn/password-managers): Reuse is the breach. Unique logins, a vault, and a way to move without a heroic weekend.
- [Two factor authentication without the confusion](https://knowyouripaddress.com/learn/two-factor-authentication): SMS, authenticator apps, and hardware keys: what to turn on first, and how not to lock yourself out.
- [How to spot a phishing email before you click](https://knowyouripaddress.com/learn/spot-phishing-emails): The sender, the link, and the rush: a practical check you can run in ten seconds.
- [How to use a VPN in real life](https://knowyouripaddress.com/learn/how-to-use-a-vpn): Travel WiFi, work, streaming, and P2P: what a tunnel changes, what it does not, and how to confirm the new IP.
- [Everyday cyber security: protect your IP, accounts, and home network](https://knowyouripaddress.com/learn/everyday-cyber-security): How phishing, public WiFi, and a visible IP actually work, and the short habits that cut most of the risk.

## Optional

- [llms-full.txt](https://knowyouripaddress.com/llms-full.txt): Longer descriptions, FAQ answers, and article summaries
- Contact: contact@knowyouripaddress.com