ipcalc
ship.sh
LanCalculator
Subnetter
Port Authority
Dipiscan
Advanced Port Scanner
Whatmask is a small C program that will help you with network settings and subnet calculations.

ipcalc
SolarWinds Virtualization Manager
calculator.net
LanCalculator
ship.sh
Subnetter
Free, 100% client-side IP subnet and CIDR calculator. Calculate IPv4/IPv6 ranges, masks, usable hosts, AWS/Azure/GCP cloud VPC offsets, and export Terraform cidrsubnet configurations instantly.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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w
whatmask
|
|
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|---|---|---|
| Website | laffeycomputer.com | devsubnet.com |
| Pricing | — | |
| Company | — | Startup from India · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of whatmask yet.
DevSubnet is a 100% client-side IP subnet and CIDR calculator engineered for network engineers, DevOps specialists, and cloud architects. All calculations execute locally in the browser with zero server logging, ensuring sensitive corporate network architectures remain private. Key Features Cloud...
What each product offers, as listed by its team.

Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing whatmask and DevSubnet.
DevSubnet's answer:
Generates 1-click configuration code for Terraform, Ansible, and CloudFormation.
DevSubnet's answer:
Legacy subnet calculators are often ad-heavy, send IP parameters to remote backend servers, and assume a generic two-IP loss per subnet (network and broadcast). DevSubnet eliminates security risks by processing everything locally with zero latency, while reflecting modern cloud-native realities—such as multi-AZ cloud VPC offsets, visual recursive subnet splitting, and direct IaC syntax generation.
DevSubnet's answer:
The primary audience includes DevOps engineers, cloud architects (AWS, Azure, GCP), network administrators, and CCNA/CCNP certification students who need fast, secure, and mathematically precise IP planning without leaking infrastructure details.
DevSubnet's answer:
Network engineers and DevOps professionals frequently plan private VPCs and Kubernetes clusters, yet most available subnet tools require transmitting sensitive CIDR blocks across the wire to unknown servers. DevSubnet was built to create a privacy-first, zero-log alternative that treats subnet calculation as an essential, high-speed developer utility with modern cloud support.
DevSubnet's answer:
DevSubnet is built as a static, client-side web application utilizing modern JavaScript/TypeScript, HTML5, and Tailwind CSS. All mathematical derivations, bitwise manipulations, and CIDR calculations run locally within the user's browser engine with zero backend compute requirements.
DevSubnet's answer:
Share your experience with using whatmask and DevSubnet. For example, how are they different and which one is better?
When comparing whatmask and DevSubnet, you can also consider the following products.
IP Calculator. ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design subnets and supernets....
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🚢 🌊 A simple, handy network addressing multitool 🔎 with plenty of features.
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SolarWinds Virtualization Manager is a virtual machine monitoring and troubleshooting.
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LanCalculator - IP Subnet Calculator for IPv4/IPv6 Networks - LizardSystems
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Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
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