IP Address Lookup

Find the geolocation, ISP, reverse DNS, and network details for any IPv4 or IPv6 address -- instantly and for free.

What This Tool Does

The IP Address Lookup tool lets you retrieve detailed geographic and network information for any public IPv4 or IPv6 address. Enter an IP and you will immediately see its country, region, and city, along with the ISP, organization, autonomous system (AS) number, and reverse DNS hostname.

Results also include the latitude and longitude coordinates for the geolocated area, the timezone, and the CIDR network block the address belongs to. This gives you a comprehensive profile of any IP address in a single lookup, without needing to consult multiple databases or services.

The IP Address Lookup is part of the free domain tools suite on Domainwise. No account or sign-up is needed. The tool supports the ?q= URL parameter, so you can share direct links to lookups or integrate them into your workflow.

Understanding the Results

Each IP lookup returns a structured set of fields that together paint a complete picture of the address and its owner:

• Geolocation -- the country, region (state or province), and city where the IP is registered. Coordinates (latitude and longitude) are provided for map-level reference.
• ISP and Organization -- the internet service provider that operates the IP range and the organization associated with the specific block. For cloud providers and data centers, this often identifies the hosting company.
• AS Number -- the Autonomous System identifier used in internet routing. This tells you which network announces the IP block to the global routing table, which is essential for network-level analysis.
• Reverse DNS -- the PTR record associated with the IP, if one exists. This is the hostname that the IP resolves to when performing a reverse lookup, such as dns.google for 8.8.8.8.
• Network / CIDR -- the IP address range block (e.g., 8.8.8.0/24) that the queried address belongs to, indicating the size and scope of the allocation.
• Timezone -- the timezone of the geolocated area, useful for correlating log timestamps with geographic regions.

Common Use Cases

The IP Address Lookup serves professionals and everyday users in several key scenarios:

• Security investigations: Trace suspicious IP addresses from access logs, firewall alerts, or failed login attempts to determine their geographic origin and the ISP responsible for the network.
• Server location verification: Confirm that your hosting provider or CDN is actually serving content from the geographic region you expect. This is critical for geo-targeting compliance and data residency requirements.
• Network troubleshooting: Identify the AS path and ISP details for an IP to diagnose routing issues, peering problems, or unexpected traffic sources in your infrastructure.
• Competitive research: Determine which hosting providers or cloud platforms competitors use by looking up the IPs their domains resolve to.
• Personal curiosity: Find out your own public IP address and see where it is geolocated, which ISP is associated with your connection, and what reverse DNS hostname is set.

IPv4 vs. IPv6 Support

The IP Address Lookup supports both IPv4 and IPv6 addresses. IPv4 addresses follow the familiar dotted-decimal format (e.g., 8.8.8.8), while IPv6 addresses use the colon-separated hexadecimal format (e.g., 2001:4860:4860::8888). Both formats return the same comprehensive set of geolocation and network details.

As more networks adopt IPv6, having a tool that handles both address families is increasingly important. Whether you are investigating an IPv4 address from legacy infrastructure or an IPv6 address from a modern deployment, the results are presented in the same clean, consistent format.

Related Guides

Deepen your understanding of how domains, IPs, and DNS are connected with these resources:

• What Is a Domain Name? -- learn how domain names map to IP addresses through the Domain Name System and why this matters for every website.
• Understanding TLDs and DNS -- explore how top-level domains work and how DNS translates names into the IP addresses that power the internet.

Find more guides and tutorials on the Domainwise article hub.