Cereio

IP Address Converter & Subnet Calculator

IPv4 Address

Dotted decimal, with optional CIDR

Decimal

32-bit unsigned integer

Binary

32-bit binary representation

Hexadecimal

32-bit hex representation
0x

About IP Address Converter

Our free online IP Address Converter helps you convert and analyze IP addresses. Convert between IPv4 decimal, binary, and hexadecimal formats, calculate subnet information, and identify IP address types including private, public, loopback, and special-purpose ranges.

Key Features

Format Conversion

Convert IP addresses between decimal, binary, and hexadecimal.

Subnet Calculator

Calculate network address, broadcast, and usable host range.

IP Classification

Identify if an IP is private, public, loopback, or special-purpose.

CIDR Support

Work with CIDR notation for subnet calculations.

100% Client-side

All calculations happen in your browser - your data stays private.

IPv4 Support

Full support for IPv4 address analysis and conversion.

How to Use

  1. 1Enter an IPv4 address in the input field (e.g., 192.168.1.1).
  2. 2Optionally add CIDR notation for subnet calculations (e.g., /24).
  3. 3View the address in different formats (decimal, binary, hex).
  4. 4See subnet information including network, broadcast, and host range.

Pro Tips

  • 💡Private IP ranges: 10.x.x.x, 172.16-31.x.x, 192.168.x.x
  • 💡Loopback address range: 127.x.x.x (commonly 127.0.0.1)
  • 💡CIDR /24 = 256 addresses, /16 = 65,536 addresses, /8 = 16M addresses
  • 💡Subnet mask 255.255.255.0 is equivalent to CIDR /24

Common Examples

IPv4 to decimal and hex

Input
192.168.1.1
Output
3232235777 · 0xC0A80101

The four IPv4 octets are combined into one unsigned 32-bit number.

Calculate a /24 subnet

Input
192.168.1.42/24
Output
Network 192.168.1.0 · Broadcast 192.168.1.255 · 254 usable hosts

The first 24 bits identify the network and the remaining 8 bits identify addresses inside it.

Related Tools

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Number Formatter

Format large decimal values for easier reading.

Frequently Asked Questions

What is an IP address?
An IP (Internet Protocol) address is a unique numerical identifier assigned to every device on a network, enabling communication between devices.
What's the difference between public and private IPs?
Private IPs (10.x, 172.16-31.x, 192.168.x) are used within local networks. Public IPs are globally unique and used on the internet.
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) uses /XX suffix to indicate subnet mask. /24 means 24 bits for network, 8 bits for hosts (256 addresses).
How many hosts in a /24 subnet?
A /24 subnet has 256 total addresses. Subtract 2 (network and broadcast) for 254 usable host addresses.