IP address lookup

Example

192.168.1.42/24

Network: 192.168.1.0
Mask: 255.255.255.0
Broadcast: 192.168.1.255
Hosts: 192.168.1.1 – 192.168.1.254
Total: 256

256 counts all addresses; the usual host range contains 254.

Technical details & limits

Location lookup reads a local XDB file and never forwards the address to a third party. The bundled ip2region data is updated irregularly, so city and operator fields can be missing or stale and should be treated as a hint about network ownership rather than a fact about a device. Address types follow IANA’s special-purpose address registries. Neither the type nor the location proves that a target is in use or reachable, and this page performs no ping or port probing.

About this tool

Look up an IPv4 or IPv6 address’s country or region, province, city and network operator, alongside its canonical form, decimal, hexadecimal and binary representations, and its address type — public, private, loopback, reserved and so on. The input is sent to this site by POST and the location comes from the ip2region offline database deployed with the site. Network and CIDR arithmetic is not part of this page.

Use cases

• Tell whether an address is public, private, loopback or reserved.
• Check the location and network operator behind an address in an access log.
• Convert an IPv4 address to a 32-bit integer for database storage.
• Check the canonical form of an IPv6 address.

How to use

1. Enter an IPv4 or IPv6 address and run it.
2. The result gives location, operator, address type and the numeric representations.
3. Every address has its own page; the link on the address row is shareable.

Input & output

Input

An IPv4 or IPv6 address, sent to this site’s server by POST. Input carrying a /prefix is accepted, but only the address itself is looked up.

Output

Country or region, province, city, network operator, address classification, and decimal, hexadecimal and binary forms.

Notes

Input is sent to this site's server by POST. Location lookup reads the bundled ip2region database and is not forwarded to a third party. Offline data may be missing or stale and is not a device's precise live position. Lookups of public addresses join this site's shared “recent lookups” list (the last 50 addresses, with nothing identifying who looked them up); private and reserved addresses are never recorded.

FAQ

Does IP geolocation lookup support both IPv4 and IPv6?

IP geolocation lookup supports individual IPv4 and IPv6 addresses using the site's local database. IPv4 addresses contain 32 bits, while IPv6 addresses contain 128. City and operator fields may be missing or outdated, so the output is a network attribution clue rather than evidence of a person's residence or a device's precise position. Confirm the address type and available fields before drawing conclusions from the location text.

Can IP lookup show whether an address is online or a port is open?

IP geolocation lookup cannot determine whether an address is online and does not scan ports. Whether you enter a 32-bit IPv4 address or a 128-bit IPv6 address, the page displays address classification and available attribution data. Connectivity, exposed services, and access permissions need separate checks. A public-looking address or a named operator does not establish that a device is currently assigned, reachable, or accepting a particular connection.

Which tool should I use for an IP address with a CIDR prefix?

Use the IP range tool for CIDR networks, because the geolocation page focuses on individual addresses. IPv4 prefix lengths range from 0 to 32, and IPv6 prefixes from 0 to 128. Switch tools when you need network boundaries, address totals, or range merging. Do not extend one address's displayed location to every address in a network, since range arithmetic and database attribution answer different questions.

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