Subnet VLSM and CIDR tools for networking. Fast IPv4 and IPv6 calculator accurate and fully offline.

NetSubnet Toolkit is an all-in-one networking app for subnetting IP addressing and network design. Built for network engineers CCNA/CCNP students and IT professionals who need fast and reliable results anytime even without internet access.

Key Features

Subnet Calculator (IPv4)

* Calculate network broadcast first and last host
* CIDR support (/8 to /32)
* Wildcard mask and binary format

VLSM Calculator

* Automatic subnet allocation
* Optimized host distribution
* No overlaps

CIDR / Subnet Mask Converter

* Convert prefix subnet mask and wildcard
* Instant results

IPv4 and IPv6 Tools

* IPv6 network calculations
* Address expansion and compression
* Advanced prefix handling

Subnet Planner

* Split networks into multiple subnets
* Ideal for network design and architecture

IP Range Generator

* Generate IP address lists
* Perfect for CCTV VoIP and enterprise networks

VLAN Assistant

* Quick VLAN calculations
* Automatic gateway suggestions

Configuration Generator

* Ready-to-use network configuration snippets
* Cisco-style commands
* Export and share easily

Smart History

* Save recent calculations
* Copy results instantly

Why choose NetSubnet Toolkit

* Professional subnet calculator and networking toolkit
* Works 100% offline
* Clean fast and intuitive UI
* Accurate results for real-world networking

Perfect for

* Network engineers
* CCNA and CCNP students
* IT technicians
* Network administrators

Design networks faster avoid subnetting errors and take your networking tools anywhere.