What Is IP Address Lookup?

An IP address lookup takes a numeric identifier — such as 103.21.244.10 (IPv4) or 2404:6800:4009::200e (IPv6) — and queries multiple public databases simultaneously to surface everything publicly known about it. The result combines three independent data sources: a live reverse DNS query to retrieve the hostname, a GeoIP database lookup to map the IP block to a country, region, and city, and an ASN registry query to identify the Internet Service Provider and autonomous system that owns and routes that IP block.

Every IP address is registered to an organisation in a specific country — IP geolocation maps those registrations to approximate physical locations

This tool accepts any valid IPv4 address, IPv6 address, or domain name. When you enter a domain like example.com, the tool first resolves it to its current IP address via a DNS A record query, then performs the full lookup. Leave the search field blank and click Get IP Details to instantly look up your own public IP — the address every website sees when you connect.

How to Use the IP Address Lookup Tool

The tool returns complete results in under three seconds. Here is exactly what each input type does and how to get the most from each lookup:

1. IPv4 address (e.g. 8.8.8.8) — the most common use. Paste any IP from a server log, email header, firewall alert, suspicious login notification, or access report.
2. IPv6 address (e.g. 2001:4860:4860::8888) — full IPv6 support. Geolocation, ISP, ASN, and PTR record are all returned identically to IPv4 lookup.
3. Domain name (e.g. cloudflare.com or amazon.in) — the tool automatically resolves the domain to its primary IP via DNS, then runs the full lookup. Useful for identifying hosting providers, CDNs, and server locations.
4. Blank field — leave the input empty and click Get IP Details to look up your own current public IP address, including your ISP, location, and whether you appear to be using a VPN.

Understanding Your IP Lookup Results — Every Field Explained

Each field in the result panel comes from a different data source. Here is a plain-language explanation of what every field means, where it originates, and how to interpret it correctly:

Each result field is sourced independently — from live DNS, RIR registries, BGP routing tables, and GeoIP databases updated daily

Country, Region & City

Sourced from GeoIP databases (MaxMind, DB-IP, IPinfo) that map IP blocks to locations based on where they are registered with the Regional Internet Registry (RIR) — APNIC for Asia-Pacific, ARIN for North America, RIPE NCC for Europe. Country accuracy is ~98–99%. Region is ~85–90%. City-level accuracy varies from 50–75% — a Jio or Airtel residential IP in Chandigarh may geolocate to Mumbai because the block is registered at Jio's Mumbai HQ. This is expected behaviour, not an error.

ISP (Internet Service Provider)

The organisation assigned this IP block by the RIR. In India: Reliance Jio (AS55836), Airtel (AS24560), BSNL (AS9829), MTNL, ACT Fibernet, Hathway. Globally: Amazon Web Services (AS16509), Google LLC (AS15169), Cloudflare (AS13335), Microsoft Azure (AS8075). The ISP field immediately tells you whether you're dealing with a home connection, a mobile network, a corporate office, or a cloud-hosted server.

ASN (Autonomous System Number)

A globally unique routing identifier assigned to every independently routed network. All IP blocks belonging to Jio share AS55836; all Google IPs share AS15169 (with a few additional ASNs). Security teams use ASNs to build firewall rules blocking entire providers at once, and to correlate attack traffic — dozens of IPs from one ASN almost certainly originate from the same operator's infrastructure.

Hostname (PTR Record)

The reverse DNS hostname the IP owner has configured. Examples: dns.google for 8.8.8.8, ec2-52-66-xx.ap-south-1.compute.amazonaws.com for an AWS Mumbai instance, broadband.airtel.net for an Airtel residential line. If no PTR is set, the field shows "No PTR record" — normal for most residential and dynamic IPs.

VPN / Proxy / Data Centre Flags

Based on ASN type classification and threat intelligence feeds. A Residential badge means traffic comes from a genuine ISP customer connection. A Data Centre badge means the IP belongs to a hosting/cloud provider — traffic likely automated. A VPN/Proxy badge means the IP is operated by a known anonymisation service, hiding the real user's location and ISP.

Coordinates & Map Pin

Latitude/longitude corresponding to the city or region centroid of the GeoIP result. These are not GPS coordinates of a device — they are the geometric centre of the city where the IP block is registered. The map pin should be treated as "somewhere in this metropolitan area," not a precise address.

How Accurate Is IP Geolocation? The Honest Answer

IP geolocation is the most misunderstood capability of IP lookup tools. It does not use GPS, it does not track devices, and it cannot identify individuals. It maps IP address blocks to locations based on where those blocks were registered — and several real-world factors affect precision:

Common Causes of Inaccurate City Results

• ISP hub registration — Jio and Airtel register millions of residential IPs under Mumbai/Delhi HQ, regardless of where the subscriber actually is
• Mobile carrier IPs — mobile networks route through regional gateways that may be hundreds of km from the subscriber
• VPN or proxy — shows the VPN server's location, completely unrelated to the user's physical location
• Corporate WAN — branch office traffic may exit through a head-office IP in a different city
• Satellite internet — Starlink registers IP blocks centrally regardless of dish placement
• CDN edge nodes — Cloudflare, Akamai, and Fastly IPs show the nearest edge node to you, not the origin server

Who Uses IP Address Lookup — and For What Purpose?

IP lookup is one of the most broadly used network tools available. From everyday users confirming their VPN works, to enterprise security teams triaging incidents — here are eight real-world scenarios where an IP lookup provides immediate, actionable intelligence:

VPN, Proxy & Data Centre Detection — What Each Flag Means

One of the most practically valuable signals in an IP lookup result is the connection type. Here is precisely what each flag means and how to act on it:

Connection type detection uses ASN classification and threat intelligence databases to distinguish residential connections from anonymising infrastructure

🟢 Residential / ISP

The IP is assigned directly to a home broadband or mobile customer by a standard ISP. In India: Jio, Airtel, BSNL, ACT, Hathway. Globally: Comcast, BT, Deutsche Telekom, etc. This is the most common type for genuine human users. No anonymisation flags. The geolocation shows the ISP's registered hub for that IP block.

⚪ Data Centre / Cloud

The IP belongs to a cloud hosting or server provider — AWS, Google Cloud, DigitalOcean, Hetzner, Linode (Akamai), Vultr, OVH. These are classified by ASN type. A data centre IP in server logs means the traffic originated from a script, bot, crawler, or automated process — not a human browsing from home. Legitimate corporate load balancers and company proxy servers also fall here.

🟡 VPN / Proxy / Tor

The IP is operated by a known commercial VPN provider (NordVPN, ExpressVPN, ProtonVPN, Surfshark) or is a listed Tor exit node or proxy server. Detection uses ASN ownership records and continuously updated VPN/Tor provider IP lists. The real user's location and ISP are completely hidden behind this server. Cannot determine the user's true location from this IP alone.

IP Lookup by Domain Name — How It Works

You do not need to know an IP address to use this tool. Entering a domain name like cloudflare.com, amazon.in, or youtube.com works identically — the tool automatically resolves the domain to its primary IP address via DNS, then performs the full geolocation and network lookup on that IP. This is useful for:

• Verifying where a website's server infrastructure is hosted (country, region, data centre)
• Identifying which CDN or cloud provider is serving a website (Cloudflare, Akamai, AWS CloudFront, Google Cloud)
• Investigating a suspicious link or domain before clicking it — check the hosting details first
• Confirming that a DNS change has propagated and the new server IP is now active globally
• Checking whether a domain recently pointed to a known malicious hosting provider

How IP Geolocation Works — The Technical Reality

IP geolocation is not GPS and not magic. It is a multi-step process combining several independent public data sources to produce a location estimate. Understanding the mechanics explains both why it is useful and where its limits lie:

Which GeoIP Databases Power This Tool

The geolocation data returned by this tool is sourced from commercial and open databases that continuously monitor IP block registrations and routing changes. The most widely deployed are MaxMind GeoLite2 / GeoIP2 — the industry standard used by millions of applications including Apache, Nginx, and major CDNs — DB-IP with strong Asia-Pacific and Indian ISP coverage, and IPinfo for accurate ASN and carrier data. These databases update daily to reflect new ISP allocations, block reassignments, and routing changes.

Why Different IP Lookup Tools Show Different City Results

If you compare results across different lookup tools for the same IP, you may see slightly different cities or coordinates. This is because each tool uses a different underlying GeoIP database, and each has slightly different city-level mappings for the same block. Country and ASN are almost always identical — they come from authoritative RIR data. City-level differences of 50–200km between tools are normal and expected. No single tool is "more correct" at city level — all are estimates.

Frequently Asked Questions — IP Address Lookup

Clear answers to every common question about IP lookup, geolocation accuracy, data sources, domain lookup, and privacy:

Related Network Tools

Combine IP Lookup with these free tools for a complete network investigation workflow — all pre-fillable with the IP from your lookup result: