subnetcalc 1.0.0

A lightweight and efficient Python tool to perform subnetting operations on IPv4 addresses. It can be used both as a standalone CLI utility and as a reusable module in your Python projects.

🧮 SubnetCalc – Fast IP Subnetting Calculator

A lightweight and efficient Python tool to perform subnetting operations on IPv4 addresses.
It can be used both as a standalone CLI utility and as a reusable module in your Python projects.

---

📦 Features

• Accepts IP addresses with or without CIDR notation (e.g. 192.168.1.1 or 192.168.1.1/24)
• Calculates:
  • IP address
  • CIDR prefix
  • Binary and decimal netmask
  • Network ID
  • Broadcast address
  • First and last usable IPs
  • All usable IPs in the subnet (as a generator)
• Built with static conversion methods (binary ↔ decimal), reusable without class instantiation
• Fully functional from the command line or as an importable Python class

---

🚀 Usage

1. CLI (Command-Line Interface)

python3 subnetcalc.py -i 192.168.1.1/24
[+] IP --> 192.168.1.1
[+] CIDR --> 24
[+] Netmask --> 255.255.255.0
[+] Network ID --> 192.168.1.0
[+] Broadcast --> 192.168.1.255
[+] Min / Max IP --> ('192.168.1.1', '192.168.1.254')

2. Import as a Module

from subnetcalc import Ip

my_ip = Ip("10.0.0.1/26")
print(my_ip.network_ip)       # 10.0.0.0
print(my_ip.broadcast)        # 10.0.0.63
print(list(my_ip.available_ips))  # List of usable IPs

---

🔧 Class & Methods

Class: Ip

Constructor

ip_instance = Ip("192.168.1.0/24")

Creates a new subnet object from an IP address string, with or without CIDR.

Attributes

• ip → base IP address (string)

• cidr → subnet prefix (e.g. '24')

• netmask → human-readable subnet mask (e.g. '255.255.255.0')

• network_ip → network ID

• broadcast → broadcast address

• min_max_ip → tuple of (first usable, last usable) IPs

• available_ips → generator that yields all usable IPs in the subnet

---

Static Methods

These can be called without creating an object:

ip_to_bin(ip: str) → str

Converts a dotted-decimal IP to its 32-bit binary representation.

bin_to_ip(bin: str) → str

Converts a 32-bit binary string back to a dotted-decimal IP.

ip_to_dec(ip: str) → int

Converts a dotted-decimal IP to a 32-bit integer.

dec_to_ip(entero: int) → str

Converts a 32-bit integer to a dotted-decimal IP.

---

📁 Example:

from subnetcalc import Ip

ip = Ip("172.16.5.9/28")
print("Netmask:", ip.netmask)
print("First usable IP:", ip.min_max_ip[0])
print("Broadcast:", ip.broadcast)

# Iterate through usable IPs
for host in ip.available_ips:
    print(host)