A private network CIDR setup validates the data model

a simple tool for finding subnet overlaps

A grep-like tool used to filter IP addresses against one or more CIDR network patterns

Pure Javascript implementation for truly checking if the provided input is an IP address. Based on RFC 791 (IPv4), RFC 4291 (IPv6), and RFC 4632 (CIDR).

This will return the cidr of an ip with the list of cidr given

Module for working with CIDR (v4, v6)

internet network classes to handle IP, MAC, DHCP, CIDR, Subnets, etc

Module for CIDR Block Calculations

npm install ip-cidr-validator

Tools to work with IPv4 and IPv6 CIDR.

Core utilities for AdaptiveWorX™ infrastructure-as-code: secret management, stack context detection, region resolution, CIDR allocation, and Zod-validated configuration schemas.

Suggests an available cidr range for a peering connection

This is a NPM library that allows you to transform a subset of denied CIDRs within a larger CIDR into a list of allowed CIDRs.

Get all CIDR networks contained in an autonomous system

Vör's Watch — lightweight, dependency-free VPS anomaly detection: file integrity, port/process baselining, outbound IP reputation, package vulnerability scanning, CISA KEV cross-reference, trusted-CIDR noise filtering, known-bot annotation, rootkit detect

Tools for working with IP4/IP6 IP Addresses including IPv4, IPv6, CIDR, and Subnet Masks

Parse IPv4/IPv6 CIDR

Utility for expanding CIDR blocks into lists of IP addresses

change 10.0.0.0/24 CIDR string into 10.0.0.*

Classes to manipulate IPv4 addresses/networks + CIDR/VLSM routines