IP Address Info

Geolocation & Network
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What is IP Address Info?

IP Address Info looks up geolocation and network information for any IPv4 or IPv6 address. Enter an IP address to see the country, region, city, ISP (Internet Service Provider), ASN (Autonomous System Number), organization, and approximate coordinates. Also detects whether the IP belongs to a VPN, proxy, Tor exit node, datacenter, or hosting provider. Click 'My IP' to look up your own public IP address.

IP geolocation databases map IP address ranges to geographic locations. Major databases: MaxMind GeoLite2 (free) and MaxMind GeoIP2 (commercial — used by most paid APIs). ip-api.com, ipinfo.io, ipgeolocation.io, and ipdata.co offer REST APIs. Accuracy varies: country-level is typically 95%+ accurate. Region/state: 80-90%. City: 60-80%, often accurate to within 50 miles. ISP and ASN: highly accurate (directly from IANA routing data). VPN detection is database-maintained and updated regularly as new VPN infrastructure is discovered.

ASN (Autonomous System Number) identifies a network under a single routing policy. Each ISP, large corporation, university, and cloud provider has one or more ASNs. IANA assigns ASNs (16-bit: AS1-AS65535, 32-bit: AS0-AS4294967295). You can query ASN routing data with: whois -h whois.radb.net AS15169 (Google's ASN). Looking Glass servers let you see BGP routes for an ASN. ASN lookup is highly reliable for identifying whether an IP belongs to AWS, Google Cloud, Cloudflare, a residential ISP, or a VPN provider.

How to Use

  1. Enter an IPv4 or IPv6 address in the input field.
  2. Click 'Look Up' to fetch geolocation, ISP, and ASN data.
  3. Click 'My IP' to auto-fill your current public IP address and look it up.
  4. See the map pin showing the approximate geographic location.
  5. Use the 'Threat intelligence' panel to see VPN/proxy/Tor detection flags.

Examples

Look up a Google DNS IP

Result: 8.8.8.8 → Country: US, City: Mountain View, CA, ISP: Google LLC, ASN: AS15169

Detect Cloudflare IP

Result: 1.1.1.1 → ISP: Cloudflare Inc., ASN: AS13335, Type: Hosting/CDN

Find own IP

Result: Click 'My IP' → 203.0.113.x → Country: JP, ISP: NTT Communications

Frequently Asked Questions

How accurate is IP geolocation?

IP geolocation accuracy varies by specificity level: Country: 95-99% accurate — reliable for basic geo-restrictions (licensing, compliance). Region/State: 80-90% accurate. City: 60-80% accurate, often accurate to 30-80km. Zip/Postal code: 40-60% accurate. Coordinates: similar to city accuracy — radius of error can be 50-100km. Corporate IPs: often geolocated to the ISP or corporate HQ, not the actual user location. Mobile IPs (carrier NAT): may geolocate to the carrier's gateway city, not the user's city. VPN users: geolocated to the VPN server, not their actual location.

What is an ASN and why is it useful for security?

An ASN (Autonomous System Number) identifies a network operator — ISP, hosting provider, or large organization — that manages a block of IP addresses. Security uses: (1) Identify if an IP is from a datacenter or hosting provider (bots often use cloud IPs). (2) Block or flag VPN and Tor traffic (ASNs of known VPN providers are listed). (3) Fraud detection — a purchase from a residential ISP is lower risk than from AWS. (4) Rate limiting per ASN rather than per IP (attackers rotate IPs within the same ASN). Tools: ip-api.com includes ASN. Hurricane Electric (bgp.he.net) has detailed ASN data.

What is the difference between a public and private IP address?

Private IP ranges (RFC 1918): 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16. These are non-routable — packets with private source/destination IPs are not forwarded by internet routers. Used for: home networks (192.168.x.x), corporate intranets, data center internal networking. Public IPs: globally routable, assigned by IANA→RIRs→ISPs. Special ranges: 127.0.0.0/8 (loopback), 169.254.0.0/16 (APIPA — automatic when DHCP fails), 100.64.0.0/10 (CGN — carrier-grade NAT shared by ISPs). When you access a website, your public IP is what the server sees — your router NATs your private IP to its public IP.

How can I find my public IP address?

From the command line: curl ifconfig.me or curl icanhazip.com. In the browser: many services show your IP — ip.me, whatismyipaddress.com, or just search 'what is my IP' in Google. If you're behind a proxy or VPN: the IP shown is the exit IP, not your real IP. From Node.js: you need an external service — your server sees the client's IP, not its own external IP (check your network interface or use a service like api.ipify.org). AWS EC2: curl http://169.254.169.254/latest/meta-data/public-ipv4. Google Cloud: curl http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/access-configs/0/external-ip.

What is a VPN and how does it change my apparent IP?

A VPN (Virtual Private Network) routes your internet traffic through a server in another location, replacing your public IP with the VPN server's IP. All sites you visit see the VPN server's IP and location, not yours. Uses: privacy (hide browsing from ISP), bypass geographic restrictions (access content licensed for other countries), security on public Wi-Fi (encrypted tunnel prevents snooping). VPN detection: IP geolocation services flag VPN IPs using ASN databases (known VPN providers), datacenter IP ranges, blacklists, and active probing. Some services block VPN IPs to enforce geographic licensing.

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