01
IP / Subnet Calculator
Calculate network address, broadcast address, subnet mask, host range and usable hosts.
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BUILT BY SAGAR RAJPUT · PYTHON · FLASK
Network Engineering Toolkit.
A practical collection of browser-based tools I built to make everyday networking tasks easier to calculate, troubleshoot, explore and understand.
From IP addressing and subnetting to DNS, TCP, ACL generation and network command references — everything is brought together in one place.
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PROJECT STATUS
ONLINE
Live & Growing
10
Tools
Python
Backend
Flask
Web Framework
10
Networking Tools
02
IP Versions
100%
Python Powered
01
Unified Dashboard
THE TOOLKIT
Built to solve real networking tasks.
I built these utilities to turn common networking calculations, checks and references into simple browser-based workflows. Whether you're troubleshooting a network, planning an IP range, learning subnetting or looking up a protocol, the goal is to make the task quicker and easier to understand.
10
practical tools
in one place
02
Subnet Planner
Divide an IPv4 network into multiple equal-sized subnets automatically.
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03
IP Range Calculator
Calculate the total number of IP addresses between a starting and ending address.
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04
DNS Lookup
Resolve hostnames and retrieve associated IP addresses using Python socket operations.
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05
TCP Port Checker
Test TCP connectivity to a hostname or IP address and determine whether a port is reachable.
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06
Secure Port Scanner
Scan authorized hosts and IPv4 addresses for reachable TCP ports and common services.
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07
Subnet & Wildcard Mask Calculator
Calculate subnet masks, Cisco wildcard masks, network details, host ranges and IPv4 RFC classifications.
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08
Multi-Vendor ACL Generator
Generate access-control and firewall policy configurations for Cisco, Aruba, Pica8, FortiGate and Palo Alto platforms.
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09
Protocol & Port Lookup
Quickly search enterprise protocols, ports, transport types, IP protocol numbers and common network services.
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10
Network Command Finder
Search official documentation and extract CLI commands across Cisco, Fortinet, Aruba, Palo Alto, and Linux.
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Python-powered networking.
The toolkit combines Python networking libraries with Flask to provide practical browser-based utilities for IT and network engineering workflows.
Python
Flask
IP Addressing
Subnetting
DNS
TCP
Socket Programming
⚠ Responsible Use
These tools are intended for learning, network administration and authorized troubleshooting. Only test systems and networks you are permitted to access.
ABOUT THIS TOOLKIT
Network Engineering Toolkit FAQ
What is the Network Engineering Toolkit?
A collection of ten free network engineering tools built with Python and Flask, covering IP addressing, subnet planning, DNS, connectivity testing, ACL generation and network documentation search.
What tools are included?
IP / Subnet Calculator, Subnet Planner, IP Range Calculator, DNS Lookup, TCP Port Checker, Secure Port Scanner, Subnet & Wildcard Mask Calculator, Multi-Vendor ACL Generator, Protocol & Port Lookup, and Network Command Finder.
Is the toolkit free to use?
Yes. All tools are free to use, though the Secure Port Scanner requires a limited-use access PIN for authorized testing.
Who built this toolkit?
The toolkit was built by Sagar Rajput, an IT Professional and Network Engineer, using Python and Flask.