IP Subnet Calculator — CIDR, VLSM & Network Analysis (2026)

Free IPv4/IPv6 subnet calculator with CIDR notation, subnet mask computation, network/broadcast address identification, usable host range analysis, wildcard mask generation, VLSM variable-length subnetting, supernetting route aggregation, and binary/hexadecimal IP conversions for network engineers and IT professionals.

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What is IP Subnet Calculator?

Calculate IPv4 and IPv6 subnets, CIDR prefix lengths, subnet masks, network addresses, broadcast addresses, usable host ranges, and wildcard masks with our free IP subnet calculator. Supporting VLSM (Variable Length Subnet Masking) for efficient IP allocation, supernetting for route aggregation, private/public IP detection (RFC 1918), multicast identification, and binary/hexadecimal conversions, this tool automates the complex binary math required for network planning, AWS VPC design, firewall ACL configuration, and CCNA/CCNP certification study.

How to Use IP Subnet Calculator

1
Enter IP Address: Input any IPv4 address (e.g., 192.168.1.100) or IPv6 address (e.g., 2001:db8::1) in the calculator.
2
Set Subnet Mask or CIDR: Choose a subnet mask from the dropdown (e.g., 255.255.255.0) or enter a CIDR prefix length (e.g., /24). The tool converts between formats automatically.
3
Calculate Results: Click calculate to instantly compute network address, broadcast address, usable host range, total hosts, wildcard mask, binary representation, and hexadecimal conversion.
4
Analyze Network: Review the full subnet analysis including network class, private/public IP status, VLSM breakdown, and supernet aggregation possibilities for your network design.

Key Features

IPv4 Subnet Calculation

IPv6 Subnet Calculation

CIDR Notation Support

VLSM (Variable Length Subnet Masking)

Supernetting Capabilities

Binary Representation

Hexadecimal Conversion

Network Address Calculation

Broadcast Address Calculation

Host Range Analysis

Network Class Identification

Private IP Detection

Public IP Analysis

Multicast Address Support

Reverse DNS Lookup

Network Security Analysis

Mobile-Friendly Interface

No Registration Required

Use Cases

Network Planning: Design and document enterprise LAN/WAN subnet schemes with proper CIDR allocation for departments, servers, and IoT devices.

Cloud VPC Design: Plan AWS VPC, Azure VNet, or GCP VPC CIDR blocks and subnet allocations for public, private, and database tiers.

VLSM Optimization: Allocate different-sized subnets within the same network (e.g., /30 for P2P links, /24 for user LANs) to maximize IP address efficiency.

Firewall ACL Configuration: Generate wildcard masks and IP ranges for access control lists on Cisco, Juniper, and other network equipment.

Route Aggregation: Calculate supernets to summarize contiguous subnets into a single routing entry, reducing routing table size.

Certification Study: Practice subnetting problems for CCNA, CCNP, CompTIA Network+, and other networking certification exams.

Troubleshooting: Verify whether two IP addresses are on the same subnet, check broadcast domains, and validate network configurations.

IPv6 Migration: Calculate IPv6 /48, /64, and custom prefix subnets for dual-stack and IPv6-only network deployments.

Security Auditing: Identify private (RFC 1918) vs. public IPs and detect multicast addresses in network scans.

About IP Subnet Calculator

What is an IP Subnet? Understanding Network Subnetting

An IP subnet is a logical subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting. This process increases network efficiency, enhances security, and simplifies management by breaking down large networks into smaller, more manageable segments. Subnetting is essential for modern network design, allowing network engineers to optimize IP address allocation, reduce broadcast traffic, and implement security boundaries between different network segments.

Our IP Subnet Calculator automates the complex binary mathematics required for subnetting, helping network engineers, IT professionals, and students quickly plan and verify network configurations. Whether you're designing a home network, configuring enterprise infrastructure, setting up cloud VPCs, or preparing for network certifications, our calculator provides instant, accurate subnet calculations with support for both IPv4 and IPv6 addresses, CIDR notation, and VLSM (Variable Length Subnet Masking).

Expert Insight: CIDR vs. VLSM in Modern Networking

"While often used interchangeably, CIDR and VLSM serve different purposes. CIDR (Classless Inter-Domain Routing) is primarily used for **route aggregation** on the public internet to keep backbone routing tables small. VLSM (Variable Length Subnet Masking), on the other hand, is used **internally** within an organization to allocate IP space efficiently by creating subnets of different sizes. Mastering both is essential for modern cloud architecture, where IP exhaustion is a constant risk even in private VPCs."

— FastTools Network Engineering Team

IPv4 Network Classes & Private IP Ranges: Complete Reference

Understanding IPv4 network classes and private IP ranges is fundamental for network design and security:

Class A Networks

Range: 1.0.0.0 - 126.255.255.255

Private: 10.0.0.0/8

Hosts: 16,777,214

Mask: 255.0.0.0

Class B Networks

Range: 128.0.0.0 - 191.255.255.255

Private: 172.16.0.0/12

Hosts: 65,534

Mask: 255.255.0.0

Class C Networks

Range: 192.0.0.0 - 223.255.255.255

Private: 192.168.0.0/16

Hosts: 254

Mask: 255.255.255.0

Class D (Multicast)

Range: 224.0.0.0 - 239.255.255.255

Private: N/A

Hosts: N/A

Mask: N/A

Class E (Reserved)

Range: 240.0.0.0 - 255.255.255.255

Private: N/A

Hosts: N/A

Mask: N/A

Loopback

Range: 127.0.0.0 - 127.255.255.255

Private: 127.0.0.1

Hosts: 1

Mask: 255.0.0.0

How to Calculate Subnets: A Step-by-Step Guide

Understanding IP subnet calculation is crucial for network administration. Here is the formula and process explained:

1. Identify the Class

Determine if the IP is Class A, B, or C to find the default subnet mask.

2. Determine Subnet Bits

Use the formula 2^n where n is the number of bits borrowed for subnetting.

3. Calculate Hosts per Subnet

Use the formula 2^h - 2 where h is the number of host bits remaining. The -2 accounts for Network ID and Broadcast Address.

4. Find the Magic Number

Subtract the interesting octet's subnet mask value from 256 to find the block size (increment).

Complete Subnet Mask Cheat Sheet: CIDR Reference Guide

Quick reference for common CIDR notation and subnet masks:

CIDR	Subnet Mask	Addresses	Hosts	Class Equivalent
/32	255.255.255.255	1	1	Host
/31	255.255.255.254	2	2 (P2P)	N/A
/30	255.255.255.252	4	2	A, B, C
/29	255.255.255.248	8	6	A, B, C
/28	255.255.255.240	16	14	A, B, C
/27	255.255.255.224	32	30	A, B, C
/24	255.255.255.0	256	254	Class C
/20	255.255.240.0	4,096	4,094	Class B
/16	255.255.0.0	65,536	65,534	Class B
/8	255.0.0.0	16,777,216	16,777,214	Class A

Real-World Subnetting Examples: Practical Applications

Understanding real-world subnetting examples helps you apply subnetting principles in practice:

Home Network

Network: 192.168.1.0/24

Mask: 255.255.255.0

Usable IPs: 254

Standard configuration for most home routers and Wi-Fi networks.

Small Business (Departments)

Network: 10.0.0.0/16

Subnets: 10.0.1.0/24 (HR), 10.0.2.0/24 (Sales)

Scale: Allows up to 256 subnets with 254 hosts each.

AWS VPC (Cloud)

VPC CIDR: 172.31.0.0/16

Public Subnet: 172.31.0.0/20 (4,096 IPs)

Private Subnet: 172.31.16.0/20

Typical default VPC configuration in AWS regions.

Docker Bridge Network

Default Bridge: 172.17.0.0/16

Container IPs: Assigned sequentially (e.g., 172.17.0.2)

Isolation: Containers on different custom bridges cannot communicate by default.

How to Use the IP Subnet Calculator: Step-by-Step Guide

Follow these simple steps to calculate IP subnets accurately:

Enter IP Address

Input your IPv4 or IPv6 address in the calculator. The calculator accepts standard IP address formats (e.g., 192.168.1.1 for IPv4).

Set Subnet Mask or CIDR

Enter subnet mask (e.g., 255.255.255.0) or CIDR prefix length (e.g., /24). CIDR notation is more common in modern networking.

Calculate Results

Click calculate to get comprehensive network analysis including network address, broadcast address, usable host range, and total hosts.

Analyze Network

Review network address, broadcast address, host range, and binary/hexadecimal representations for complete network understanding.

Advanced Network Calculation Features

Network Address Calculation

Calculate network address using IP and subnet mask

Broadcast Address

Determine broadcast address for the subnet

Host Range Analysis

Calculate usable host addresses and ranges

Binary & Hex Conversion

Convert between decimal, binary, and hexadecimal

The Strategic Importance of Subnetting in Modern Networking

In the rapidly evolving landscape of digital infrastructure, IP subnetting is not merely a technical requirement but a strategic imperative for robust network design. At its core, subnetting involves dividing a large network into smaller, manageable sub-networks, or "subnets." This segmentation is critical for optimizing network performance and enhancing security posture. Without effective subnetting, networks suffer from excessive broadcast traffic, where every device constantly processes signals meant for others, leading to significant congestion and latency. By creating smaller broadcast domains, network engineers ensure that traffic is localized, preserving bandwidth for critical applications and improving overall throughput.

Beyond performance, subnetting acts as a fundamental layer of network security. By isolating different departments, applications, or user groups into distinct subnets, administrators can implement granular access control policies. For instance, a finance department's sensitive data can be logically separated from the guest Wi-Fi network, preventing unauthorized access and containing potential security breaches. This segmentation also simplifies troubleshooting; when an issue arises, it can be quickly isolated to a specific subnet rather than affecting the entire infrastructure. In an era of increasing cyber threats, the ability to compartmentalize network resources through precise subnet calculation is a vital skill for any IT professional.

Network Subnetting Diagram showing Router and Subnets

Figure 1: Network Segmentation via Subnetting

Evolution of IP Addressing: From Classful to CIDR and VLSM

The history of the Internet Protocol (IP) is a testament to the need for scalability. In the early days, the Classful IP addressing system (Class A, B, and C) was sufficient, allocating IP addresses in rigid blocks. However, as the internet exploded in popularity, this inefficient allocation led to the rapid exhaustion of IPv4 addresses. Many organizations were assigned vast blocks of IPs they didn't need, while others starved for address space. This crisis necessitated the development of Classless Inter-Domain Routing (CIDR), a revolutionary shift that allowed for flexible subnet masking.

CIDR introduced the concept of Variable Length Subnet Masking (VLSM), which empowers network architects to allocate IP space with surgical precision. Unlike the fixed class boundaries, VLSM allows subnets of different sizes to coexist within the same network design. For example, a point-to-point link between routers can be assigned a /30 subnet (4 IPs), while a main office LAN uses a /24 (254 IPs). This efficiency maximizes the utility of the limited IPv4 address pool and significantly reduces routing table size on the internet backbone. Understanding the transition from classful to classless addressing is essential for mastering modern routing protocols like OSPF and BGP, which rely heavily on CIDR for efficient route aggregation.

Comparison of IPv4 and IPv6 Address Spaces

Figure 2: The Evolution from IPv4 to IPv6

Mastering Network Design: IPv4, IPv6, and the Future

As we look toward the future of connectivity, the coexistence of IPv4 and IPv6 is the new reality. While IPv4 remains dominant in many internal networks, the global depletion of public IPv4 addresses has accelerated the adoption of IPv6. A master network designer must be proficient in both. IPv6 solves the addressing limitation by offering a virtually infinite address space, eliminating the need for NAT (Network Address Translation) and restoring end-to-end connectivity. However, the principles of subnetting remain just as relevant. In IPv6, subnetting is used not to conserve addresses, but to organize the network logically and efficiently.

Modern cloud networking environments, such as AWS Virtual Private Clouds (VPCs) and Azure Virtual Networks, rely heavily on these fundamental concepts. Designing a resilient cloud architecture requires careful planning of IP address ranges to avoid overlap when peering with on-premises data centers. Whether you are configuring a small office network or a global enterprise SD-WAN, the ability to calculate subnets accurately—determining the network address, broadcast address, and usable host range—is the bedrock of reliable connectivity. Tools like this IP Subnet Calculator bridge the gap between complex binary math and practical implementation, enabling engineers to build the scalable, secure networks of tomorrow.

Figure 3: Understanding CIDR Notation

Privacy & Security: Your Network Data Stays Private

Your privacy and data security are our top priorities. Our IP subnet calculator processes all information locally in your browser:

Client-Side Processing

All subnet calculations happen directly in your browser using JavaScript. Your IP addresses, subnet masks, and calculation results never leave your device or get transmitted to our servers. No data is sent over the internet during calculations.

No Data Storage or Tracking

We don't store, log, or track any of your network data. There's no database of your IP calculations, no analytics on your usage, and no way for us to access your IP addresses or subnet information. Your privacy is completely protected while using our tool.

Safe for Enterprise Use

You can use the calculator with confidence for enterprise network planning, cloud VPC design, and security analysis. All calculations happen locally, ensuring your network topology and IP addressing schemes remain private and secure.

Trusted by 50,000+ Engineers

CCNP Reviewed

100% Free & No Ads

Written by Network Engineering Team

Reviewed by CCNP Certified Professionals

Last Updated: March 21, 2026

Version.1.0 • IPv6 Ready

Frequently Asked Questions

What is CIDR notation?: CIDR represents a modern IP addressing system that replaces traditional class-based networks. This notation employs a forward slash followed by a numeric value (like /24) to define how many bits are allocated for the network identifier portion of an IP address.
What is the difference between IPv4 and IPv6?: IPv4 uses 32-bit addresses (4.3 billion addresses) while IPv6 uses 128-bit addresses (340 undecillion addresses). IPv6 provides better security, auto-configuration, and eliminates the need for NAT.
What is VLSM?: VLSM (Variable Length Subnet Masking) allows you to use different subnet masks for different subnets within the same network, enabling more efficient use of IP addresses.
How to check subnet mask of IP?: On Windows, open Command Prompt and type 'ipconfig'. On Mac/Linux, open Terminal and type 'ifconfig' or 'ip addr'. The subnet mask will be listed next to your IP address.
How to calculate subnet address?: Perform a bitwise AND operation between the IP address and the Subnet Mask in binary form. The result is the Network Address (Subnet Address).
How many subnets are allowed in the network?: The number of subnets is calculated using the formula 2^n, where 'n' is the number of bits borrowed from the host portion for subnetting.
How many IPs are in the range?: The total number of IPs is 2^h, where 'h' is the number of host bits. The number of usable IPs is 2^h - 2 (subtracting network and broadcast addresses).
What is the subnet mask for my IP?: The subnet mask depends on your network configuration. Common defaults are 255.0.0.0 (Class A), 255.255.0.0 (Class B), and 255.255.255.0 (Class C), but CIDR allows for any prefix length.
How to use IP Subnet Calculator?: Simply enter your IP address and select the Subnet Mask (or CIDR prefix). The calculator will automatically compute the Network Address, Broadcast Address, IP Range, and Number of Hosts.
What is an IP Subnet Calculator?: An IP Subnet Calculator is a tool that automates the complex binary math required for subnetting. It helps network engineers quickly plan and verify network configurations.
How do I calculate subnet mask from IP address?: The subnet mask depends on your network configuration, not just the IP address. For Class A networks, default mask is 255.0.0.0 (/8). Class B uses 255.255.0.0 (/16). Class C uses 255.255.255.0 (/24). With CIDR, you can use any prefix length. Use our calculator to determine the appropriate subnet mask based on your network requirements and number of needed hosts.
What is my subnet mask? How to find it?: To find your subnet mask, on Windows open Command Prompt and type 'ipconfig'. On Mac/Linux, open Terminal and type 'ifconfig' or 'ip addr'. The subnet mask appears next to your IP address. Alternatively, use our subnet calculator by entering your IP address—it will show common subnet masks used with that IP range.
How to calculate network address from IP and subnet mask?: To calculate network address, perform a bitwise AND operation between the IP address and subnet mask in binary form. Convert both to binary, perform AND operation (1 AND 1 = 1, all else = 0), then convert back to decimal. This gives you the network address. Our calculator performs this automatically—just enter your IP and subnet mask to get instant results.
How to calculate broadcast address?: The broadcast address is the last address in a subnet, where all host bits are set to 1. To calculate it manually, take the network address, set all host bits to 1, and convert to decimal. For example, in 192.168.1.0/24, the broadcast is 192.168.1.255. Our calculator automatically calculates broadcast addresses for any subnet.
How many hosts can a /24 subnet have?: A /24 subnet (255.255.255.0) has 256 total IP addresses, with 254 usable hosts. The formula is 2^8 - 2 = 254, where 8 is the number of host bits (32 - 24 = 8). The -2 accounts for the network address (first IP) and broadcast address (last IP). This is the most common subnet size for small networks.
What is a /28 subnet? How many hosts?: A /28 subnet has a subnet mask of 255.255.255.240. It provides 16 total IP addresses (2^4), with 14 usable hosts (16 - 2). This subnet size is perfect for small departments, point-to-point links, or VLANs that need just a few IP addresses. Common in VLSM designs where different subnets need different sizes.
How to calculate CIDR notation?: CIDR notation is written as IP address followed by a forward slash and number (e.g., 192.168.1.0/24). The number after the slash represents the number of network bits. To calculate CIDR from subnet mask, count the consecutive 1s in the binary subnet mask. For example, 255.255.255.0 has 24 network bits, so it's /24. Our calculator converts between subnet masks and CIDR notation automatically.
What is the difference between subnet mask and CIDR?: Subnet mask (e.g., 255.255.255.0) and CIDR (e.g., /24) represent the same information in different formats. Subnet mask uses dotted decimal notation, while CIDR uses prefix length notation. CIDR is more concise and commonly used in modern networking, routing protocols, and cloud configurations. Both indicate how many bits are used for the network portion of an IP address.
How to subnet a network? Step by step guide.: To subnet a network: 1) Determine number of subnets needed, 2) Calculate subnet bits using 2^n formula, 3) Calculate host bits remaining (32 - network bits - subnet bits), 4) Calculate usable hosts per subnet (2^host_bits - 2), 5) Calculate subnet mask, 6) Calculate network addresses for each subnet. Our calculator automates this entire process—enter your requirements and get instant subnetting results.
What is VLSM and how does it work?: VLSM (Variable Length Subnet Masking) allows different subnets within the same network to have different subnet masks, enabling efficient IP address allocation. Unlike fixed-length subnetting, VLSM lets you create subnets of various sizes based on actual needs. For example, a point-to-point link uses /30 (2 hosts), while a LAN uses /24 (254 hosts). This maximizes IP space utilization and is essential for modern network design.
How to calculate supernet or route aggregation?: Supernetting combines multiple contiguous subnets into a single larger network. To calculate supernet, find the common network bits in all subnets, then create a CIDR block that encompasses them all. For example, 192.168.1.0/24 and 192.168.2.0/24 can be aggregated as 192.168.0.0/16. This reduces routing table size and improves network efficiency. Our calculator supports supernetting calculations.
What are private IP addresses? Which ranges?: Private IP addresses are non-routable on the public internet, used for internal networks. RFC 1918 defines three ranges: 10.0.0.0/8 (10.0.0.0 to 10.255.255.255), 172.16.0.0/12 (172.16.0.0 to 172.31.255.255), and 192.168.0.0/16 (192.168.0.0 to 192.168.255.255). These addresses are reused across different private networks and are not globally unique. Our calculator automatically identifies private IP addresses.
How to convert binary IP address to decimal?: To convert binary IP to decimal, split the 32-bit binary into four 8-bit octets. Convert each octet from binary to decimal. For example, 11000000.10101000.00000001.00000001 = 192.168.1.1. Each binary position represents a power of 2 (rightmost is 2^0, leftmost is 2^7). Sum the positions with 1s. Our calculator shows IP addresses in binary, decimal, and hexadecimal formats for comprehensive understanding.
What is wildcard mask? How to calculate it?: A wildcard mask is the inverse of a subnet mask, used in ACLs (Access Control Lists) and routing protocols like OSPF. To calculate wildcard mask, subtract each octet of the subnet mask from 255. For example, subnet mask 255.255.255.0 has wildcard mask 0.0.0.255. In binary, wildcard mask uses 0s where bits must match and 1s where bits can vary. Our calculator provides wildcard masks for any subnet.
How many subnets can I create from a /24 network?: The number of subnets depends on how many bits you borrow from the host portion. For a /24 network (8 host bits), if you borrow 2 bits for subnetting, you get 2^2 = 4 subnets, each with 2^6 - 2 = 62 hosts. Borrowing 3 bits gives 2^3 = 8 subnets with 30 hosts each. Our calculator helps you determine optimal subnetting based on your requirements.
What is the default gateway and how to calculate it?: The default gateway is typically the first usable IP address in a subnet (network address + 1). For example, in subnet 192.168.1.0/24, the default gateway is usually 192.168.1.1. However, it can be any usable IP in the subnet, though the first or last usable IP is most common. Our calculator shows the usable IP range, and the first IP is commonly used as the gateway.
How to use subnet calculator for AWS VPC?: For AWS VPC, use CIDR notation (e.g., 172.31.0.0/16). Our calculator helps you plan VPC CIDR blocks and subnet allocation. AWS supports /16 to /28 CIDR blocks for VPCs. Use VLSM to create subnets of different sizes (e.g., /20 for public subnets, /20 for private subnets within a /16 VPC). Our calculator shows host ranges, which helps plan subnet CIDRs for your VPC architecture.
How to check if two IPs are in the same subnet?: To check if two IPs are in the same subnet, calculate the network address for both IPs using the same subnet mask. If both IPs produce the same network address, they're in the same subnet. Our calculator makes this easy—enter both IPs with the same subnet mask, and if they show the same network address, they're on the same subnet.
What is the maximum number of hosts in a subnet?: The maximum number of usable hosts depends on the subnet mask. With a /8 subnet (Class A), you can have 16,777,214 usable hosts (2^24 - 2). However, in practice, subnets are much smaller for manageability. A /24 subnet has 254 usable hosts, which is common for most networks. Our calculator shows the maximum hosts for any subnet size.
How to calculate first and last usable IP address?: The first usable IP is the network address + 1, and the last usable IP is the broadcast address - 1. For example, in 192.168.1.0/24, network is 192.168.1.0, first usable is 192.168.1.1, last usable is 192.168.1.254, and broadcast is 192.168.1.255. Our calculator automatically shows the first and last usable IP addresses for any subnet.
What is point-to-point subnet? Best CIDR for P2P links?: Point-to-point (P2P) links connect exactly two devices (e.g., routers). The best CIDR for P2P links is /30 (255.255.255.252), which provides 4 IPs: network address, broadcast address, and 2 usable IPs (one for each end). Some networks use /31 (255.255.255.254) which provides 2 IPs total, but this is less common. Our calculator helps you plan P2P subnets efficiently.
How to calculate subnet for class A, B, C networks?: Class A uses /8 (255.0.0.0), Class B uses /16 (255.255.0.0), and Class C uses /24 (255.255.255.0) as default masks. However, with CIDR, you can subnet these classes into smaller networks. For example, a Class A network can be subnetted into multiple /24 subnets. Our calculator supports all network classes and shows how CIDR notation works with each class.
Is subnet calculator free to use?: Yes, our subnet calculator is completely free with no charges, subscriptions, or registration required. You can perform unlimited subnet calculations, access all features (IPv4/IPv6, CIDR, VLSM, binary/hex conversion), and use the tool for personal, educational, commercial, or professional purposes without any cost. All features are available without limitations.
Can I use subnet calculator on mobile devices?: Yes! Our subnet calculator is fully responsive and works perfectly on mobile devices, tablets, and desktop computers. The calculator is optimized for touch screens, making it easy to enter IP addresses and subnet masks on the go. You can use it for network planning, troubleshooting, or certification exam preparation, wherever you are.
How accurate is the subnet calculator?: Our subnet calculator is highly accurate, using precise binary arithmetic and standard networking formulas. The calculations match industry-standard methods used by network equipment and protocols. Results are suitable for production network planning, cloud VPC design, and professional use. The calculator follows RFC standards for IP addressing and subnetting.

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IP Subnet Calculator — CIDR, VLSM & Network Analysis (2026)

IP Subnet Calculator

Calculate IPv4 and IPv6 subnets with CIDR notation support.

IP Version

Calculation Type

IP Address (e.g., 192.168.1.1)

Try Quick Examples:

Subnet Mask

CIDR Prefix Length

Advanced Options

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What is IP Subnet Calculator?

How to Use IP Subnet Calculator

1
Enter IP Address: Input any IPv4 address (e.g., 192.168.1.100) or IPv6 address (e.g., 2001:db8::1) in the calculator.
2
Set Subnet Mask or CIDR: Choose a subnet mask from the dropdown (e.g., 255.255.255.0) or enter a CIDR prefix length (e.g., /24). The tool converts between formats automatically.
3
Calculate Results: Click calculate to instantly compute network address, broadcast address, usable host range, total hosts, wildcard mask, binary representation, and hexadecimal conversion.
4
Analyze Network: Review the full subnet analysis including network class, private/public IP status, VLSM breakdown, and supernet aggregation possibilities for your network design.