IP Address Lookup
Look up network prefix, Autonomous System Number (ASN), ISP organization, and approximate geographic location for any IPv4 or IPv6 address.
Best solution
Network diagnostic: IP Address Lookup; ISP Network & Estimated Geo Location.
Manual query sends this IP to IP Guide / Neptune Networks. Approximate location data: MaxMind. The provider also sees your request address.
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Methodology & calculation rule
Queries IP Guide and MaxMind GeoLite databases to resolve BGP prefix routing, ASN organizational ownership, and approximate country/city heuristics.
Network observations execute bounded requests to public measurement backends (ipify, Google Public DNS, Globalping, or Cloudflare). Measurements distinguish local client configuration from external internet reachability.
No browsing history, private tokens, or credentials are captured. Results are snapshots of external probe vantage points at the recorded observation timestamp.
Real-World Context & Technical Standards
Autonomous System Numbers (ASN)
Every network on the global internet is assigned an Autonomous System Number (ASN) registered with regional internet registries (ARIN, RIPE, APNIC), defining inter-domain BGP routing relationships.
City-Level vs. Country-Level Heuristics
GeoIP databases estimate physical locations based on ISP allocations and routing telemetry. Country-level mapping is over 99% accurate, whereas metropolitan city-level resolution varies between 50% and 80%.
Anycast DNS and CDN Edge Nodes
Public resolvers (such as 1.1.1.1 or 8.8.8.8) broadcast the identical IP address from hundreds of data centers worldwide via BGP Anycast; looking up their location reflects registration rather than physical proximity.
Related network diagnostic tools
| Tool | Metric | Scope |
|---|---|---|
| What Is My IP Address? | Diagnostic | what is my ip address |
| Remote Ping Test | Diagnostic | ping test |
| DNS Lookup | Diagnostic | dns lookup |
| Is It Down? | Diagnostic | is it down |
| Packet Loss Test | Diagnostic | packet loss test |
Frequently Asked Questions
What is an Autonomous System Number (ASN)?
An ASN is a globally unique identifier assigned to an organization (ISP, enterprise, or cloud provider) that controls routing policies across BGP on the global internet.
How accurate is GeoIP city-level location?
Country-level accuracy exceeds 99%, but city-level accuracy typically ranges between 50% and 80% because providers reassign IP blocks across metropolitan edge centers dynamically.
Can I look up private IPv4 addresses like 192.168.1.1?
No. Private IPv4 addresses (RFC 1918) are non-routable across the public internet and exist only within local area networks.