What Is My IP Address

Understand your IP address — what it is, what it reveals about you, the difference between public and private IPs, and why it changes. See your current IP instantly, no account required.

What Does an IP Address Tell You?

IPv4 — the original standard: IPv4 addresses are 32-bit numbers written as four octets (e.g., 203.0.113.42). With only ~4.3 billion possible combinations, the global IPv4 pool is fully exhausted — RIRs stopped distributing new blocks years ago, which is why CGNAT and IPv6 are now essential.
IPv6 — the modern replacement: IPv6 uses 128-bit addresses (e.g., 2001:0db8:85a3::8a2e:0370:7334), providing 340 undecillion unique addresses — enough to assign billions of IPs to every grain of sand on Earth. IPv6 eliminates the need for NAT on modern networks.
Public IP vs. private IP: Your public IP is assigned by your ISP and is visible to the entire internet. Your private IP (RFC 1918 ranges: 192.168.x.x, 10.x.x.x, 172.16–31.x.x) exists only within your local network — routers use NAT to map private IPs to the single public IP your ISP assigns.
What your IP reveals: Any server you connect to sees your public IP. From it, they can determine your approximate city, your ISP name, your autonomous system number (ASN), and your likely timezone. They cannot see your street address, name, or device details without additional data.
Why your IP changes: Most residential ISPs use dynamic IP assignment via DHCP — your router requests an IP lease that expires and renews, often every 24 hours to 7 days. Restarting your router, reconnecting after an outage, or switching from mobile data to Wi-Fi also triggers a new IP assignment.

Check My IP

How to Read Your IP Address Information

Identify your public IP: The address shown on this page is your internet-facing IP — the one all websites, servers, and online services see when you make any connection. This is not the same as the IP shown in your device's network settings.
Distinguish IPv4 from IPv6: If your ISP and device both support dual-stack networking, you will see both an IPv4 address (four groups of numbers, e.g., 198.51.100.7) and an IPv6 address (eight groups of hexadecimal, e.g., 2001:db8::1). IPv6-only services will connect using only the IPv6 address.
Read the ISP and ASN fields: The ISP name confirms which provider owns the IP block. The Autonomous System Number (ASN) identifies the specific routing domain — useful for determining whether traffic is going through a VPN provider, hosting company, or residential ISP.
Understand the location data: The city and country shown are derived from IP geolocation databases, not GPS. Country accuracy is typically above 95%, but city-level data can be off by tens to hundreds of kilometers depending on how the ISP registered its IP blocks.
Check whether you are behind NAT: If you use CGNAT (Carrier-Grade NAT), multiple households share a single public IP. The IP shown here is the address your ISP's NAT gateway presents to the internet — not a dedicated address for your connection alone.

Real-World Use Case

A student working from their university dorm tries to access their employer's internal HR portal and receives a "403 Forbidden" error. Confused, they check their current public IP using this tool and note that their dorm network's ISP IP block is registered in a different city — triggering the portal's geo-restriction filter. They contact IT support, share the IP address, and the admin confirms the block is geo-based rather than account-based. Understanding what their IP reveals — specifically the registered location of the ISP's IP block — let them diagnose the problem immediately rather than spending hours troubleshooting credentials or browser settings.

Best Practices

Never assume your IP is static: Residential ISPs almost universally issue dynamic IPs. Before using your IP for firewall whitelisting, VPN setup, or remote access configuration, confirm with your ISP whether you have a truly static assignment.
Learn the private IP ranges by heart: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are the three RFC 1918 private ranges. If your device shows an address in these ranges under network settings, that is your LAN address — not your public IP.
Use a VPN to control what your IP reveals: A VPN replaces your real public IP with the VPN server's IP in all outbound connections, masking your ISP, approximate city, and ASN from websites you visit.
Check your IP from each network you use: Mobile data, home broadband, office Wi-Fi, and coffee shop hotspots each carry a different public IP — verify which one you are on before providing an IP for whitelisting or documentation.
Understand dual-stack implications: On networks that support both IPv4 and IPv6, websites may connect to you over either protocol. Firewall rules that only cover IPv4 leave IPv6 traffic unrestricted — check both addresses when configuring access controls.

Performance & Limits

Detection is passive: Your IP is read directly from the HTTP request your browser sends — no active scanning, no third-party calls, and no browser extensions required to detect it.
IPv4 exhaustion context: IANA allocated the last IPv4 /8 blocks in 2011. Regional registries (ARIN, RIPE, APNIC) subsequently exhausted their pools. New addresses are now only available through secondary market transfers, which is why CGNAT and IPv6 deployment have accelerated.
CGNAT detection limitation: If your ISP uses Carrier-Grade NAT, the IP shown here is shared among many subscribers. There is no reliable way to determine from the outside whether a given IP is CGNAT without querying the ISP directly or testing port reachability.
Geolocation database freshness: Databases like MaxMind GeoIP2 are updated weekly, but ISP re-assignments can take weeks to propagate — recently transferred IP blocks may geolocate incorrectly until databases catch up.
IPv6 prefix length: ISPs typically assign a /64 or /56 IPv6 prefix to each customer. The specific host address within that prefix is generated by the device (SLAAC) or assigned by DHCPv6 and may change with each reconnection.

Common Mistakes to Avoid

Treating your router's WAN IP as static: The IP shown in your router's WAN interface is your current dynamic IP lease — it may match what this tool shows, but it will change on router restart or lease renewal unless you have a paid static IP plan.
Sharing private IP addresses for external troubleshooting: Telling someone your device's IP address (192.168.1.x) when they need your public IP wastes time — only the public IP shown by this tool is relevant for internet-facing configuration.
Concluding a VPN is working based only on a connection indicator: VPN apps sometimes show "connected" while leaking your real IP through WebRTC or DNS. Always confirm the IP shown on this page after connecting to a VPN — it should reflect the VPN server's address, not your ISP's.
Using IP location to make legal or financial decisions: IP geolocation is an approximation tool, not a verified identity source. Country-level blocking and content licensing decisions based purely on IP geolocation will always have false positives due to database inaccuracies and VPN usage.

Privacy & Security

Your IP is already exposed to every site you visit: HTTP and HTTPS both transmit your source IP in every request — it is not a secret. Checking it here does not expose anything that was not already visible to every server you connect to.
NAT provides no real anonymity: While NAT hides individual devices behind a shared public IP, ISPs retain logs linking your account to the IP addresses assigned to you at any given time. These logs can be subpoenaed by law enforcement.
VPNs shift trust, not eliminate it: Using a VPN replaces your ISP's visibility with your VPN provider's visibility. Choose a provider with a verified no-logs policy if privacy from your VPN provider is also a concern.
No data retained by this tool: This page detects and displays your IP for your own reference. No IP addresses, browser fingerprints, or session data are logged or stored beyond the duration of your page visit.

Frequently Asked Questions

What is an IP address and what is it used for?

An IP address (Internet Protocol address) is a numerical label assigned to every device that participates in a network using the Internet Protocol. It serves two functions: host identification (identifying which device is communicating) and location addressing (routing data packets to the correct destination). Without IP addresses, routers would have no way to direct traffic between billions of devices. IPv4 addresses are 32-bit numbers (e.g., 192.0.2.1) and IPv6 addresses are 128-bit numbers (e.g., 2001:db8::1). Every website request, email, video stream, and online game involves your IP address appearing in packet headers so that the response traffic knows where to return.

What is the difference between IPv4 and IPv6?

IPv4 is the original addressing system introduced in 1981, using 32-bit addresses that allow approximately 4.3 billion unique addresses — a number that proved insufficient as internet-connected devices multiplied. IPv6 was standardized in 1998 to solve this exhaustion problem, using 128-bit addresses that provide 340 undecillion (3.4 × 10^38) unique addresses. Beyond scale, IPv6 also eliminates the need for NAT (since every device can have a globally unique address), improves routing efficiency, and includes built-in support for IPsec encryption. Many ISPs now operate dual-stack networks that support both protocols simultaneously, with IPv6 preferred when available.

Why does my IP address change?

Most residential internet connections use dynamic IP assignment: your ISP's DHCP server issues your router an IP address with a lease duration — typically 24 hours to 7 days. When the lease expires, your router requests a renewal and may receive the same IP or a different one from the ISP's available pool. Your IP also changes when you restart your router, when your ISP performs network maintenance, or when you switch between connection types (e.g., from cable to mobile hotspot). ISPs using CGNAT may change your shared public IP even more frequently. If your IP changing causes problems (e.g., breaking firewall whitelists), a dynamic DNS (DDNS) service or a paid static IP plan from your ISP are the standard solutions.

What can someone do with my IP address?

With your public IP address alone, someone can: perform a geolocation lookup to determine your approximate city and ISP; attempt to connect to ports on your IP to scan for open services (though your router's firewall blocks most inbound connections by default); send traffic to your IP as part of a DoS attack (though your ISP can null-route or mitigate this); and submit a legal request to your ISP to identify the subscriber assigned that IP at a specific time. They cannot directly access your device, read your files, determine your home address, or see your browsing activity — those require additional attack vectors beyond simply knowing your IP address.