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What's My IP, User Agent & Browser Info

See your public IP address, user agent, request headers and browser capabilities, instant lookup, no tracking.

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Frequently asked questions

What data does this tool send to your servers?
Nothing — your browser connects to our server and we read the IP address and headers from that incoming connection. No additional data is uploaded by you. We do not log your IP address or request headers beyond the immediate response computation, and nothing is stored or associated with your identity.
What is IP geolocation and how accurate is it?
IP geolocation maps an IP address to a physical location by consulting databases that track which organisations (ISPs, companies) own which IP address blocks and where they are registered. Accuracy varies significantly: country-level geolocation is correct over 95% of the time, city-level accuracy drops to around 50–80%, and street-level accuracy is not reliable. Mobile networks, VPNs, corporate proxies, and CDN exit nodes frequently cause geolocation to show a location far from your actual position.
Why does my IP look different here than on other 'what is my IP' sites?
If you use a VPN, proxy, or Tor, the IP shown is the exit point of that service, not your home connection. Corporate networks often route internet traffic through centralised proxies that give all employees the same public IP. Some ISPs use carrier-grade NAT, assigning the same public IP to multiple customers. The IP shown is always the address our server actually received the request from, which is the same address all websites on the internet see.
What are HTTP request headers and why does my browser send them?
HTTP headers are metadata fields that accompany every web request, telling the server about your browser's capabilities and preferences. Common headers include Accept (supported content types), Accept-Language (preferred language), Accept-Encoding (supported compression methods), and User-Agent (browser identification). They are sent automatically by your browser without any action on your part, and every website you visit can see all of them.
Is my IP address stored or logged anywhere?
No. Your IP address is used only to generate the response you see on screen and is discarded immediately after. We do not maintain server-side logs that associate individual IP addresses with access times, do not sell or share IP data, and do not use it for advertising targeting. Aggregate, anonymised traffic statistics may be maintained for capacity planning but do not contain individual IP addresses.
How is this different from running 'curl ifconfig.me' or similar commands?
'curl ifconfig.me' makes an HTTP request from your terminal and returns your public IP as plain text — functionally the same operation for the IP itself. This tool additionally parses your User-Agent, lists all your request headers in a readable format, runs client-side capability detection, and shows IPv6 alongside IPv4 if available. The terminal command is more scriptable; this tool is more informative for manual inspection.
My IPv6 address changes frequently — is that normal?
Yes. Most modern operating systems implement IPv6 Privacy Extensions (RFC 4941), which generate a new randomised IPv6 address every 24 hours (or at each new network connection) to reduce the ability of websites to track you across sessions. Your ISP assigns you a /64 or /56 prefix that stays stable, but the interface portion of the address is randomised. This is a privacy feature, not a problem.
Can websites track me across different sessions using my IP address?
Yes, to a limited extent. Most residential connections are assigned a dynamic IP that changes periodically (days to weeks), making long-term tracking unreliable on IP alone. However, within a single session or on a stable business connection, IP-based tracking is straightforward. VPNs change the IP seen by websites but do not eliminate all other tracking vectors (cookies, browser fingerprinting, logged-in accounts).
What does 'behind CGNAT' mean and how does it affect me?
Carrier-Grade NAT (CGNAT) means your ISP assigns many customers to a single public IP address, performing NAT at the ISP level rather than just at your home router. This means you share a public IP with potentially hundreds of other customers. Consequences include being unable to host internet-facing services, occasional IP-based bans affecting you due to another customer's behaviour, and difficulty with some peer-to-peer applications. Many mobile data connections use CGNAT by default.
What is a VPN and how does it change what this tool shows?
A Virtual Private Network (VPN) routes your internet traffic through a server operated by the VPN provider, replacing your ISP-assigned IP with the VPN server's IP address. This tool will show the VPN exit server's IP address rather than your true public IP. Geolocation will reflect the VPN server's location. This is the core privacy mechanism of consumer VPNs, though it shifts trust from your ISP to the VPN provider rather than eliminating it.

About What's My IP, User Agent & Browser Info

Your public IP address is the numeric label assigned to your internet connection by your Internet Service Provider (ISP), and it is the address that every website, server, and online service sees when you connect to them. IPv4 addresses are 32-bit numbers written as four octets (e.g. 203.0.113.42), while IPv6 addresses are 128-bit numbers written in hexadecimal groups (e.g. 2001:db8::1). If your ISP supports IPv6, you may have both. Your IP address is used for routing traffic back to you, but it is also the basis for IP geolocation — a technique that maps addresses to approximate physical locations using databases of ISP allocation records. Geolocation is widely used for content regionalisation, fraud detection, and access control, but it is an approximation: it typically resolves to the city level at best and can be off by hundreds of kilometres, especially for mobile networks and VPNs.

Knowing your public IP is useful in a surprising range of everyday situations. Remote access users need it to configure port forwarding rules on their routers. Game server admins whitelist IPs for admin access. Security-conscious users check it to confirm a VPN is actually routing their traffic. Developers building geolocation-dependent features test what location their API sees. Network engineers verify that dual-stack IPv4/IPv6 connectivity is working as expected. IT support staff often ask 'what's your IP?' as a first troubleshooting step for remote access problems.

This tool reads the IP address directly from the HTTP request your browser makes to our server — no external lookup is needed for the raw IP itself. It also parses every HTTP header your browser includes in the request, shows your parsed User-Agent string, and runs a set of client-side JavaScript checks for browser capability detection (such as cookie support, JavaScript availability, and screen metrics). If an IPv6 address is available on your connection, the tool will show it in addition to your IPv4 address. We do not log, store, or share any of this information — the result is computed per-request and discarded after your browser receives it.

When reading your results, remember that the IP address shown is your public-facing address, not your private LAN address (which typically starts with 192.168, 10., or 172.16–31.). If you are behind a corporate proxy, carrier-grade NAT, or a shared Wi-Fi connection, multiple users may share the same public IP. The geolocation shown — if any — is an estimate based on your ISP's IP allocation and should not be treated as your precise location. HTTP headers like Accept-Language, Accept-Encoding, and DNT (Do Not Track) reveal your browser's preferences and are sent automatically on every request you make to any website.

The Number That Connects You to the World

The 32-bit IPv4 address space was designed in 1981 by Vint Cerf and Bob Kahn as part of the original TCP/IP specification, yielding approximately 4.3 billion unique addresses. At the time, this seemed more than sufficient — the entire internet consisted of a few hundred machines. By the early 1990s it was clear that 4.3 billion addresses would not be enough for a global internet, prompting the development of IPv6 with its 128-bit address space providing 340 undecillion addresses (3.4 × 10^38). The exhaustion of the central IANA IPv4 pool was officially declared on 3 February 2011, followed by regional registries exhausting their pools throughout the 2010s.

Network Address Translation (NAT), the technology that allows many devices to share a single public IP through a home router, was initially regarded as an ugly hack and a violation of the internet's end-to-end design principle. Its author, Paul Francis (then at NTT), later said in interviews that he expected NAT to be a two-year stopgap while IPv6 was deployed. Instead, NAT extended IPv4's life by decades and is now so ubiquitous that most internet users have never had a routable public IP address of their own. The side effect is that the internet's original peer-to-peer design — where any node could initiate a connection to any other node — has been substantially eroded.

IP geolocation databases are maintained by companies like MaxMind (GeoIP), IP2Location, and various cybersecurity vendors. They are built by correlating ISP registration records (WHOIS and ARIN/RIPE/APNIC allocations), BGP routing announcements, and active measurement data. The business is surprisingly lucrative: geolocation is used to enforce content licensing agreements (why a Netflix show is available in one country but not another), prevent payment fraud, serve localised advertising, and comply with sanctions regulations. The data is imperfect by nature because IP allocations frequently change and ISPs may serve customers far outside their registration geography.

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