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IP Address Info & Analyzer

Analyze IP addresses: class (A/B/C/D/E), binary representation, subnet mask, private/public check, IPv4/IPv6 detection.

Address Information

Version
IPv4
Class
C
Default Mask
255.255.255.0 (/24)
Network Type
Private (192.168.0.0/16)

Status

Private Address
Not routable on the public internet

Binary Representation

11000000.10101000.00000001.00000001

Common CIDR Notations

CIDRSubnet MaskUsable Hosts
/8255.0.0.016,777,214
/16255.255.0.065,534
/24255.255.255.0254
/25255.255.255.128126
/26255.255.255.19262
/27255.255.255.22430
/28255.255.255.24014
/30255.255.255.2522
/32255.255.255.2551
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Frequently Asked Questions

What are IP address classes?
IPv4 addresses are divided into five classes based on the first octet. Class A (1-126) supports 16 million hosts per network. Class B (128-191) supports 65,534 hosts. Class C (192-223) supports 254 hosts. Class D (224-239) is for multicast. Class E (240-255) is reserved for experimental use. This classful addressing system has been largely replaced by CIDR but remains important for understanding network fundamentals.
What is the difference between private and public IP addresses?
Private IP addresses are reserved for use within local networks and are not routable on the internet. The private ranges are: 10.0.0.0/8 (Class A), 172.16.0.0/12 (Class B), and 192.168.0.0/16 (Class C). Public IP addresses are globally unique and routable on the internet. Your router uses NAT (Network Address Translation) to map private addresses to a public address for internet access.
What is a subnet mask?
A subnet mask determines which part of an IP address identifies the network and which part identifies the host. For example, 255.255.255.0 (/24) means the first 24 bits are the network portion and the last 8 bits identify hosts. Subnet masks enable dividing networks into smaller subnets for better organization and security.
How does the binary representation help?
Viewing an IP address in binary helps understand subnetting, network masks, and bitwise operations used in routing. Each octet converts to 8 binary digits, so an IPv4 address is always 32 bits. Understanding binary is essential for calculating subnet boundaries, broadcast addresses, and valid host ranges.
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses (about 4.3 billion unique addresses) written as four decimal octets like 192.168.1.1. IPv6 uses 128-bit addresses (340 undecillion addresses) written as eight groups of four hexadecimal digits like 2001:0db8:85a3::8a2e:0370:7334. IPv6 was created to solve IPv4 address exhaustion and includes built-in security and autoconfiguration features.
Is my IP address data sent to any server?
No, all analysis happens entirely in your browser. The IP address you enter is processed using client-side JavaScript only. No data is transmitted to any server, ensuring complete privacy for network analysis tasks.

How to Use the IP Address Analyzer

Understanding IP addresses is fundamental for network administration, web development, and cybersecurity. Our IP address analyzer provides instant information about any IPv4 or IPv6 address, all processed in your browser for complete privacy.

Step 1: Enter an IP address. Type any valid IPv4 address (like 192.168.1.1) or IPv6 address (like 2001:db8::1) into the input field. The tool validates the format and provides feedback if the address is invalid.

Step 2: View the analysis. The tool instantly displays the address class, binary representation, whether it is private or public, the default subnet mask, and common CIDR notations. All information updates in real-time as you type.

Step 3: Use the information. Copy any value to use in network configuration, documentation, subnet calculations, or educational materials. The binary representation is particularly useful for understanding subnetting operations.

IP Address Fundamentals

An Internet Protocol (IP) address is a numerical label assigned to each device connected to a computer network. IPv4 addresses consist of four octets (8-bit numbers from 0-255) separated by dots, creating a 32-bit address space of approximately 4.3 billion unique addresses. Due to the exhaustion of IPv4 addresses, IPv6 was developed with 128-bit addresses providing a virtually unlimited address space.

The classful addressing system divides IPv4 addresses into five classes. Class A networks (1.0.0.0 to 126.255.255.255) have a default mask of 255.0.0.0 and support millions of hosts per network. Class B networks (128.0.0.0 to 191.255.255.255) use 255.255.0.0 and support thousands of hosts. Class C networks (192.0.0.0 to 223.255.255.255) use 255.255.255.0 and support 254 hosts. While CIDR (Classless Inter-Domain Routing) has replaced classful routing, understanding classes helps with default configurations and legacy systems.

Private vs Public IP Addresses

RFC 1918 reserves three blocks of IPv4 addresses for private networks: 10.0.0.0/8 (16 million addresses), 172.16.0.0/12 (1 million addresses), and 192.168.0.0/16 (65,536 addresses). These addresses are used within homes, offices, and data centers for internal communication. They cannot be routed on the public internet and require Network Address Translation (NAT) to communicate with external services.

Public IP addresses are globally unique identifiers assigned by Internet Service Providers (ISPs) through regional internet registries. Every device that communicates directly on the internet needs a public IP address. Understanding whether an address is private or public is crucial for firewall configuration, network security auditing, and troubleshooting connectivity issues.

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