IP to Number Converter

Convert IPv4 addresses to 32-bit integers and back, with hex, binary, octal, and address class details. Free IP to number converter.

Input

IP to number Number to IP

IPv4 address

Results Enter an IPv4 address to start.

Decimal number - Converts live as you type

IPv4 address - Dotted decimal notation

Hexadecimal -

Binary -

Octal -

Signed 32-bit -

Reversed octets -

Address class -

Every IPv4 address is a single unsigned 32-bit integer between 0 and 4,294,967,295. The signed 32-bit value is what some programming languages, such as PHP's ip2long, return.

Tool Introduction

Convert between IPv4 addresses and their 32-bit integer values in both directions. Every IPv4 address is one unsigned integer between 0 and 4,294,967,295, and this converter shows the decimal, hexadecimal, binary, and octal forms side by side.

Integers are the format used by IP range calculations, geo-IP databases, and firewall processing. The page also flags the address class, the signed 32-bit value some languages return, and the reversed octets used by DNS blocklists.