IP Converter

What the IP converter does

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Why an IP address can be written as a number

An IPv4 address is a 32-bit number. The dotted form 192.168.1.1 is only a readable way to write its four bytes. The same address is 3232235777 in decimal and 0xC0A80101 in hexadecimal. Databases often store addresses as numbers, because numbers sort and compare correctly and take less space. Many browsers even open http://3232235777/ as http://192.168.1.1/.

IPv6 addresses are 128-bit numbers, written as eight groups of hexadecimal digits. Read how to read an IPv6 address for the short-form rules.

CIDR blocks and ranges

A CIDR block such as /24 describes a group of addresses that share their first bits: a /24 has 256 addresses, a /28 has 16. Firewalls, cloud security groups and allowlists usually want CIDR blocks, while people often think in ranges such as "from .1 to .20". The range converter gives you the exact blocks to paste into those settings. For subnet details such as usable hosts and the broadcast address, use the subnet calculator. Background: subnet masks and CIDR explained.

Frequently asked questions

How large a list can I create?

The list shows the first 256 addresses on the page; copy and download contain up to 65,536 addresses (a /16).

What is an IPv4-mapped IPv6 address?

::ffff:192.168.1.1 is how IPv6 software writes an IPv4 address. You see it in server logs when a program listens on IPv6 and IPv4 at once.

Is 0177.0.0.1 the same as 127.0.0.1?

In many programs, yes: a leading zero means octal, so 0177 is 127. Security filters that do not know this can be tricked, which is why the converter also shows the octal form.

Last updated October 29, 2026 by the FindMyIPLocation team.