
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.
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.

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

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...
No description of whatmask yet.
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 DevSubnet and whatmask.
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 DevSubnet and whatmask. For example, how are they different and which one is better?
When comparing DevSubnet and whatmask, you can also consider the following products.
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LanCalculator - IP Subnet Calculator for IPv4/IPv6 Networks - LizardSystems
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