IP Address Lookup
Your IP Address
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Amazon Web Services
Network
aws.amazon.com
United States
Columbus
Amazon Web Services Inc.
Organisation
Network Tools
What is an IP Address Lookup?
An IP address is the numeric identifier assigned to every device that connects to a network. When you go online, your ISP allocates an IP address to your connection, and that address is recorded in public registration databases maintained by regional internet registries around the world.
An IP lookup queries those databases to retrieve the registration data behind any address. The results include the owning organization, the geographic region associated with the network block, the ISP or upstream provider, the Autonomous System Number used for routing, and the abuse contact for reporting malicious activity. Accuracy varies by field: ASN and network block assignments are precise by design because the routing system depends on them. City-level coordinates are estimates, usually accurate within a country but sometimes off by hundreds of kilometers for mobile, satellite or VPN connections.
This tool also handles domain WHOIS lookups and ASN queries, covering all the main identifiers you encounter when investigating network activity.
Common Use Cases
Security and Abuse
Trace the origin of suspicious traffic, identify the network behind an attack, and find the right abuse contact for reporting. Knowing whether a source is a residential ISP, a hosting provider or a known Tor exit node changes how you respond.
Network Troubleshooting
Verify BGP routing, confirm ASN ownership, check that an IP block is registered to the organization you expect. When diagnosing connectivity issues between networks, having the contact details for the remote network's NOC is often the fastest path to resolution.
Fraud Prevention
Cross-reference a user's stated location against their IP's registered region during payment processing or account creation. Large discrepancies between billing address and IP country are a reliable signal worth flagging for manual review.
Content Localisation
Serve region-appropriate content, apply local pricing, or restrict access to geo-licensed material based on IP country data. Geolocation at the ISP level is also useful for compliance with regulations that vary by jurisdiction.
Email Deliverability
Before sending from a new IP address, check it against spam reputation lists to confirm it is not blacklisted. A single entry on a major DNSBL can cause bulk rejection by receiving mail servers, so verifying status before a campaign saves significant trouble after the fact.
Penetration Testing
Map the attack surface of a target network by resolving hostnames, looking up the ASN that owns an address range and identifying hosting providers. Understanding the network topology before testing helps scope the engagement accurately and avoid going out of bounds.
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IPv4 and IPv6
IPv4 addresses are 32-bit numbers written in dotted-decimal notation, for example 203.0.113.1. The total pool of roughly 4.3 billion addresses reached exhaustion at the global registry level in 2011, and most regional registries ran out of their allocations in the years that followed. New allocations to operators now come primarily through transfers and auctions rather than direct registry assignment.
IPv6 addresses are 128-bit, written in hexadecimal groups, for example 2001:db8::1. The available space is so large that exhaustion is not a practical concern. Adoption has been growing steadily and IPv6 now carries a significant share of global internet traffic, particularly on mobile networks and in regions where IPv4 space is expensive. This tool supports lookups for both address versions, and the subnet calculator handles the very different arithmetic that IPv6 requires.
Frequently Asked Questions
How accurate is IP geolocation?
Country-level accuracy is above 99% for well-registered address blocks. City-level accuracy ranges from 50% to 80% depending on how the ISP structures its address space. Mobile networks, VPNs and satellite connections often show the location of the network hub rather than the user.
What data does a lookup return?
Each lookup returns the country, region and city, the ISP and organization name, the ASN used for routing, VPN/proxy detection, average ISP connection speed based on real-world measurements, and blacklist/threat status. For domains we also return WHOIS registration data. All results come from our own databases.
What is an ASN and why does it matter?
An Autonomous System Number identifies a network that participates in BGP routing. ISPs, hosting providers and large organizations each operate one or more ASNs. The ASN behind an IP address tells you which network owns it at the routing level, which is often more useful than the organization name when investigating abuse or connectivity issues.
Why does the location differ from where the user actually is?
IP geolocation reflects where the network block is registered, not where the device sits. VPNs and proxies show the server's location. Mobile carriers route traffic through regional hubs that may be in a different city. Satellite providers show the ground station's location. In all these cases the actual user can be hundreds of kilometres away from the mapped position.
How large is the IPWhois.net database?
Our IPv4 database covers 3,100,000+ IP ranges across 70,000+ ASNs, with VPN detection for 12,000+ ranges and speed data for 7,000+ ISPs. We also maintain 293,000+ IPv6 ranges and 52,000+ MAC vendor entries. All data is refreshed weekly through automated pipelines.
Our IP Database
IPWhois.net operates its own geolocation database built from multiple authoritative sources. We cross-reference data from regional internet registries, BGP routing tables and proprietary geolocation feeds to produce a unified dataset that covers the entire routable IPv4 and IPv6 address space.
The database is refreshed weekly through automated pipelines. VPN and proxy detection combines multiple commercial and open-source intelligence feeds. ISP speed data is derived from independent network measurement platforms. MAC address vendor records are compiled from official hardware registration authorities.
All lookups on this site query our own databases first, with no external API calls for the core result. This keeps response times under 50ms for most queries and means the service works even when third-party APIs are down.
We actively work with ISPs and network operators worldwide to keep our records accurate. If you are an ISP and would like to update or verify your data in our database, get in touch.
