IP Lookup — Free IP Geolocation, ISP & Security Check

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How to IP Lookup Online

1. 1

   Enter any public IPv4 address (e.g., 8.8.8.8), IPv6 address (e.g., 2001:4860:4860::8888), or domain name (e.g., cloudflare.com) into the input search field.

2. 2

   Optionally click the "My IP" button or press ⌘⇧M (Ctrl+Shift+M on Windows) to automatically discover and inspect your current outbound public IP address.

3. 3

   Select a sample entry from the preset examples list to quickly query public DNS resolvers, cloud provider endpoints, and Anycast network nodes.

4. 4

   Click the "Lookup" button or press ⌘↵ (Ctrl+Enter) to trigger server-side IP resolution, reverse PTR queries, and geographic intelligence mapping.

5. 5

   Review comprehensive geolocation data: country flag, region/state name, metropolitan city, postal/ZIP code, and latitude/longitude GPS coordinates.

6. 6

   Inspect network infrastructure attributes including Internet Service Provider (ISP), network organization name, Autonomous System Number (ASN), and BGP routing tag.

7. 7

   Examine security classification flags including commercial VPN usage, public proxy gateways, Tor exit nodes, datacenter hosting blocks, and mobile cellular carriers.

8. 8

   Check the target location timezone, UTC offset, and real-time local clock calculation for international operations and distributed incident investigation.

9. 9

   Click any coordinate link to open the geographic location directly in Google Maps, or click individual fields to copy specific values to your clipboard.

10. 10

    Copy the complete normalized result as structured JSON using ⌘⇧C or share the exact lookup state using the synchronized URL parameters.

11. 11

    Integrate IP lookups into automated scripts, security pipelines, or monitoring tools by making GET requests to our `/api/tools/ip-lookup` JSON endpoint.

IP Lookup Features

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  Dual-Stack IPv4 & IPv6 Geolocation: Full support for 32-bit dotted-decimal IPv4 and 128-bit hexadecimal IPv6 addresses with automatic notation validation.

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  Automatic Domain Name Resolution: Seamlessly resolve any hostname (e.g. google.com) into its active IP address and retrieve full geographic and network intelligence.

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  One-Click Outbound "My IP" Detection: Instantly look up your public internet-facing IP address, ISP, and geographic location without manual input.

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  Granular Location Intelligence: Country flag, country code, region/state, metropolitan city, postal/ZIP code, and exact GPS decimal coordinates.

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  Network ASN & BGP Route Attribution: Autonomous System Number (ASN) mapping, routing prefix names, and parent network organization discovery.

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  Reverse DNS (PTR) Hostname Resolution: Automatically performs reverse PTR lookups to uncover canonical hostnames and FCrDNS records.

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  Security & Threat Intelligence Flags: Identifies datacenter/hosting IP blocks, commercial VPN exit nodes, public proxies, and mobile cellular gateways.

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  Timezone & Local Clock Synchronization: Displays the official IANA timezone ID, UTC offset in seconds, and computed local time at the target IP destination.

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  National Metadata Enrichment: Includes ISO calling codes, primary spoken languages, national currency codes, and currency symbols.

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  Interactive Map Integration: Direct Google Maps linking for visual confirmation of latitude and longitude coordinates.

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  Browser History & State Persistence: Saves your recent lookups in client-side localStorage and synchronizes queries to browser URL search params for bookmarking.

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  Normalized Structured JSON Export: One-click copying of structured API payloads with ⌘⇧C for instant pasting into security incident tickets or terminal scripts.

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  High-Throughput Stateless API: Server-side REST endpoints (/api/tools/ip-lookup) supporting developer automation with zero client CORS issues.

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  Zero Logging & Absolute Privacy: All lookup queries execute ephemerally in memory without logging IP queries, storing user identifiers, or recording activity.

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  Power User Keyboard Shortcuts: Speed up workflows with ⌘↵ (Lookup), ⌘⇧M (My IP), ⌘⇧C (Copy JSON), and ⌘⇧K (Clear).

Supported Formats & Dialects

The IP Lookup supports 6 syntax formats and dialects for accurate parsing and processing.

IPv4 Dotted-Decimal Notation

Standard 32-bit Internet Protocol version 4 addresses written as four decimal octets (0–255) separated by periods (e.g., 8.8.8.8, 1.1.1.1, 198.51.100.1).

IPv6 Hexadecimal Notation (RFC 5952)

128-bit Internet Protocol version 6 addresses formatted as eight colon-separated 16-bit hexadecimal blocks with double-colon zero compression (e.g., 2001:4860:4860::8888, 2606:4700:4700::1111).

Fully Qualified Domain Names (FQDN)

Standard alphanumeric domain hostnames (e.g., cloudflare.com, dns.google) automatically resolved to A/AAAA DNS records before querying geolocation.

Autonomous System Numbers (ASN / BGP)

Unique 16-bit or 32-bit identifiers (e.g., AS15169 Google LLC, AS13335 Cloudflare, Inc.) utilized by Border Gateway Protocol (BGP) routing tables to identify network ownership.

Reverse DNS PTR Records (in-addr.arpa / ip6.arpa)

Reverse pointer records mapped in authoritative DNS zones that resolve numerical IP addresses back to authoritative canonical hostnames.

Private, Loopback & Bogon Subnets

Non-routable IP ranges (RFC 1918 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16; RFC 5735 loopback 127.0.0.0/8; RFC 6598 CGNAT 100.64.0.0/10) identified and validated with explicit private network warnings.

Frequently Asked Questions

How does IP geolocation resolution work under the hood?

IP geolocation maps numerical IP addresses to physical geographic locations by querying databases compiled from Regional Internet Registries (RIRs such as ARIN, RIPE NCC, APNIC, LACNIC, and AFRINIC), Border Gateway Protocol (BGP) routing announcements, Internet Service Provider (ISP) network topology infrastructure, and latency triangulation. Because IP addresses are allocated in blocks to organizations rather than individual physical devices, geolocation identifies the network routing node or ISP point-of-presence (PoP) servicing the connection.

What is the accuracy difference between country-level, city-level, and street-level IP location?

IP geolocation is highly reliable at the country level (99%+ accuracy) and metropolitan/state level (~80–90% accuracy within a 25–50 km radius for fixed broadband lines). However, IP geolocation cannot and does not pinpoint exact street addresses or household coordinates. Accuracy varies based on ISP routing topologies: Anycast networks, cellular mobile networks, and enterprise VPN tunnels route user traffic through distant regional gateways, causing the reported city to reflect the network aggregation hub rather than the end device physical location.

How does the tool differentiate between IPv4 and IPv6 geolocation data?

The tool automatically inspects the input string format using strict RFC regex validation to identify whether the target is a 32-bit IPv4 address or a 128-bit IPv6 address. For IPv6 lookups, the system analyzes the allocated /32, /48, or /64 prefix block assigned to the hosting provider or ISP. Both address families return equivalent structured metadata including ISO country codes, coordinates, AS numbers, and reverse DNS records.

What is an Autonomous System Number (ASN) and why is BGP routing data important?

An Autonomous System (AS) is a collection of connected IP routing prefixes under the control of one or more network operators that presents a single, clearly defined routing policy to the internet. An ASN is the globally unique number assigned by IANA/RIRs to identify each Autonomous System (such as AS15169 for Google or AS13335 for Cloudflare). Identifying the ASN helps network engineers determine who owns and routes the network block, discover peering relationships, and verify routing paths in BGP tables.

How does the tool detect VPNs, commercial proxies, Tor nodes, and datacenter hosting IPs?

The security evaluation analyzes known IP ranges published by datacenter and cloud providers (such as AWS, Google Cloud, Microsoft Azure, DigitalOcean, and OVH), public Tor exit node directories, and commercial proxy/VPN server exit lists. If an IP address originates from a known cloud hosting subnet rather than a residential or commercial internet service provider, the tool flags `isHosting: true` or `isProxy: true`, allowing security teams to recognize automated bots, scrapers, and anonymization networks.

What is Reverse DNS (rDNS / PTR) and how does it relate to Forward-Confirmed Reverse DNS (FCrDNS)?

Reverse DNS maps an IP address back to its canonical hostname using PTR records stored in the `in-addr.arpa` (IPv4) or `ip6.arpa` (IPv6) DNS tree. Forward-Confirmed Reverse DNS (FCrDNS) is a two-way validation method where the resolved PTR hostname is verified to resolve back to the original IP address via standard forward DNS (A/AAAA records). Mail servers (like Gmail and Outlook) and security firewalls require valid FCrDNS configurations to prevent spam and verify sender authenticity.

Why are private, loopback, and bogon IP addresses not routable for geolocation?

Private IP ranges (RFC 1918 blocks: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16), Carrier-Grade NAT subnets (RFC 6598: 100.64.0.0/10), loopback addresses (127.0.0.1, ::1), and link-local addresses (169.254.0.0/16, fe80::/10) are reserved for internal local networks and are non-routable on the public internet. Because they are reused across millions of private local area networks worldwide, they have no global public geographic location or ISP ownership.

How does domain-to-IP resolution work when inputting a domain name like google.com?

When you enter a domain name or URL hostname into the IP Lookup tool, our server-side resolver first performs a forward DNS query to resolve the domain to its authoritative IPv4 (A record) or IPv6 (AAAA record) address. Once the IP address is obtained, the tool executes the geolocation, network ASN, and security analysis on the resolved address while preserving the original domain query in the response.

How does Anycast routing affect the geographic location of DNS resolvers and CDNs?

Anycast routing allows multiple physical servers in data centers across the globe to share the exact same public IP address (such as 8.8.8.8 for Google DNS or 1.1.1.1 for Cloudflare). When you look up an Anycast IP, geolocation databases typically report the corporate headquarters or primary registry location of the owning company (e.g., California or Australia) rather than the specific local edge server that responds to your personal internet connection.

How can I query the IP Lookup tool programmatically via REST API?

You can query the IP Lookup API directly by sending a GET request to `https://wtool.dev/api/tools/ip-lookup?ip=8.8.8.8` or a POST request with `{ "ip": "8.8.8.8" }` and `Content-Type: application/json`. The API returns a normalized JSON payload containing `query`, `resolvedIp`, `country`, `city`, `lat`, `lon`, `timezone`, `isp`, `org`, `as`, `reverse`, `isProxy`, `isVpn`, `isHosting`, and national metadata.

Does DevFlow IP Lookup log or store the IP addresses I search?

No. We adhere to a strict zero-retention privacy policy. All IP lookup queries are processed entirely in-memory on our stateless backend servers to query geolocation providers and DNS resolvers. No searched IP addresses, user identifiers, or query logs are ever written to databases or persistent storage. Your recent lookup history is stored strictly in your own local browser localStorage.

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