What Is My IP Address?

What Is an IP Address and Why Does It Matter?

An IP (Internet Protocol) address is a unique numerical label assigned to every device connected to a network, defined in RFC 791 for IPv4 and RFC 8200 for IPv6. It serves as the internet’s addressing system. Without it, data packets cannot find their destination. Every website visited, every email sent, and every API call made requires the sender’s IP address to deliver the response.

Your public IP address is visible to every server you connect to. It reveals your approximate geographic location (typically city-level), your Internet Service Provider, and the network block your connection belongs to. DNS Checker detects your public IP and enriches it with data from MaxMind GeoLite2, all five Regional Internet Registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and published blocklists, which together describe what the internet sees when you connect.

What This Check Returns

Every lookup runs the same set of checks. Every result includes the categories below, for free, with no signup required. The underlying database processes ASN data and threat intelligence daily across the RIR-delegated IP blocks from all five Regional Internet Registries.

How Does IP Geolocation Work?

IP geolocation maps numerical IP addresses to physical coordinates using databases maintained by providers like MaxMind, IP2Location, and the Regional Internet Registries. These databases correlate IP block allocations (which are public registry data) with geographic locations through a combination of network topology analysis, latency measurements, and user-submitted corrections.

Accuracy varies by connection type. Fixed broadband typically achieves 80% city-level accuracy and 95-99% country-level accuracy. Mobile networks are less precise because carriers route traffic through centralized gateways, so a user in Portland may appear in Denver. VPN and satellite connections show the server or ground station location rather than the user’s actual position.

DNS Checker displays an accuracy radius on the interactive map to indicate confidence. A 10km radius means high confidence; a 200km radius suggests the location is an estimate. The geolocation data is sourced from MaxMind GeoLite2, updated weekly, and cross-referenced with RIR allocation records.

How to Check If Your VPN Is Actually Working

A VPN can hide your address and still leak you in three other ways, so checking the IP alone is not enough. Load this page with the VPN off and note the address, ISP and city. Connect the VPN, reload, and the address should change to the VPN server’s, the ISP should become a hosting provider rather than your own, and the city should be the exit location.

The three leaks that survive that check are measured above, on this page. The DNS leak test shows which resolvers answer for you and whether they sit on the same network as your connection; queries leaving the tunnel is the most common failure and the hardest to notice. The WebRTC leak test asks four STUN servers what address they see, because the browser will hand that to any script without asking you. The browser versus network panel compares your machine’s time zone and language against the country the IP geolocates to, which is the mismatch fraud systems act on.

One caveat worth holding onto: a clean result on all three is not a guarantee. Each test reports what it observed, and a probe that comes back empty means the probe came back empty, not that nothing is leaking. An IPv6 leak, for instance, needs a separate request to a host that only answers over IPv6, which this page does not yet make.

What Can Someone Do With Your IP Address?

An IP address alone provides limited but non-trivial information. Any website or service you connect to receives your IP as part of normal network communication. From it, they can determine your approximate city-level location, your ISP, and whether you are connecting from a residential, business, or datacenter network. This data is routinely used for content localization (showing local weather or language), fraud prevention (flagging logins from unexpected countries), and regulatory compliance (enforcing geo-restrictions).

However, an IP address cannot reveal your name, home address, email, phone number, or browsing history. A WHOIS lookup shows the network operator and registration details for an IP block, but only your ISP can link an IP to a subscriber identity, and this requires legal process in virtually all jurisdictions. The practical risks of IP exposure are modest for most users: targeted advertising, approximate location tracking, and in rare cases, DDoS attacks directed at a specific IP. Using a VPN eliminates all of these by substituting the VPN server’s IP for your own.

What If Someone Is Misusing Your IP Address?

Because this tool shows your own IP address, the abuse contacts displayed are the contacts responsible for your IP block, typically your ISP. This is useful if your IP has been compromised or is being used for malicious activity without your knowledge. Common scenarios include: a device on your network is infected with malware and sending spam or participating in a botnet; someone on a shared network (apartment complex, university, co-working space) is conducting abuse from the same public IP. Use the reverse IP domain check to see all domains hosted on your IP; or your IP has been spoofed in packet headers to make attacks appear to originate from your address.

If DNS Checker shows a non-zero threat score for your IP, it means your address appears on one or more blocklists. This can cause email delivery failures, CAPTCHA challenges on websites, or service denials. Check which blocklists flagged your IP in the threat analysis section, then contact your ISP using the abuse contacts shown. They can investigate whether your IP was involved in malicious activity and request delisting.

If you are receiving unwanted traffic or attacks from a different IP address, use the IP Geolocation Lookup tool to investigate the attacker’s IP. That tool provides the same full analysis for any IP address and includes an abuse report generator, a structured template for filing reports with the attacker’s ISP, hosting provider, or the relevant Regional Internet Registry. The Blacklist Checker can also verify whether the attacking IP is already listed on DNSBL/RBL databases.