IP Address Lookup.
Enter an IPv4 or IPv6 address, or a domain name, to see which network and organisation own it, its reverse DNS name, its address range and its AS number.
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What Is an IP Address Lookup?
An IP address lookup tells you who is behind an internet address. It shows the network the address belongs to, the organisation that holds that block, the range it sits in, the country it is registered in and the autonomous system (AS) that announces it on the internet.
The details come from the five regional internet registries (ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC), which publish them through RDAP, plus public routing data for the AS number. We also read the reverse DNS name, which is the hostname the address owner has set for the address.
A lookup shows who registered an address block, such as a hosting company or an internet provider. It does not show a street address or the person using the connection. For the full registry record, use the IP WHOIS lookup.
Who Is Behind an Address.
The network details come from the regional internet registries (ARIN, RIPE NCC, APNIC and others) through their public RDAP services, plus public routing data.
IPv4 and IPv6
Both address types are accepted. Type a domain name instead and the tool looks up the address it points to.
Reverse DNS
The hostname set for the address, if any. Mail servers check it, so a correct reverse DNS matters when you send email from a server.
Network owner
The network name and the organisation the address block belongs to, such as a hosting company or an internet provider.
Range and country
The address range (CIDR) the IP belongs to and the country it is registered in.
Routing and AS number
The autonomous system (AS) that announces the address on the internet, its name and the prefix it announces.
Domain to address
See which address a website name resolves to, and who runs the network behind it.
Common Problems and Fixes.
Questions people often have after an IP lookup.
It says the address is not public
Addresses such as 10.x.x.x, 172.16.x.x to 172.31.x.x and 192.168.x.x are private. They only work inside a network, so no registry holds a record for them.
The owner is a company, not a person
That is normal. Websites, apps and many users sit on rented servers or shared connections, so the registered owner is the company that provides the address.
Reverse DNS says "None set"
The owner of the address has not set a PTR record. For a mail server this hurts delivery, so ask your hosting provider to set reverse DNS to your mail server's hostname.
The country looks wrong
The country comes from the registry record, which shows where the block was registered, not where a device sits. Owners can use blocks in other countries.
A website shows a different owner than I expected
Sites behind a content delivery network such as Cloudflare resolve to the network's addresses, so the owner shown is the CDN, not the web host. This is also how the real server stays hidden.
I want to report abuse from an address
Use the IP WHOIS lookup to find the abuse contact of the network, then send your evidence (log lines with time and time zone) to that address.
Related Free Tools.
Frequently Asked Questions
Quick answers about this tool.
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