I Built a CIDR Calculator for Cloud Networking (AWS, Azure, Kubernetes)

Mahammad Rafi — Thu, 11 Jun 2026 20:26:59 +0000

Subnetting and CIDR calculations are essential skills for anyone working in cloud and networking.

But in real-world scenarios—especially in AWS, Azure, GCP, and Kubernetes—CIDR planning can quickly become confusing and error-prone.

The Problem
While working with cloud environments, I noticed:

Manual CIDR calculations take time.
Subnet planning gets complex very quickly.
CIDR overlaps cause major issues in networking.
Most tools don’t explain the concepts clearly.

Why I Built This

To solve this, I created:

👉 https://www.cidrhub.com

CIDRHub is more than just a calculator — it's a cloud networking tool and learning platform.

What It Does

1) Fast CIDR calculations.

2) Subnet mask & IP range generation.

3) Cloud network planning (AWS, Azure, GCP, Kubernetes).

4) Practical subnetting guidance.

Real-World Focus

CIDRHub helps you:

Avoid CIDR overlaps
Plan scalable subnets
Understand real cloud networking
Design better architectures

Who Is This For?

Network Engineers
DevOps Engineers
Cloud Engineers
Students learning networking

Try It

👉 https://www.cidrhub.com

Final Thoughts

Subnetting is a core skill, but it doesn't have to be complicated.

The goal of CIDRHub is to make subnetting easier and more practical for real-world use.

Would love your feedback!

DEV Community: Mahammad Rafi

I Built a CIDR Calculator for Cloud Networking (AWS, Azure, Kubernetes)

What It Does

Real-World Focus

Try It