Network - Subnet (Network Range)

Card Puncher Data Processing


A subnet is technically a division of an network by range of ip address

A subnet is also known as:

  • a net range (ie -
  • or a CIDR (different notation - ie

In the internet age, all networks may be considered as subnet.

It is used to represent a subnet of hosts which can be reached over a network interface.


A SubNet is a partially qualified internet address in numeric (dotted quad) form, optionally followed by a slash and the netmask, specified as:

All hosts on a subnet have the same mask.


The world

How to find the net range of a IP

In a whois request, you can see the NetRange back (and the CIDR notation)


NetRange: -



A private subnet has no Internet access and can host the backend systems such as databases or application servers.

See Network - Private Network


A public subnet send and receive traffic directly from the internet.

See Network - Public Network



The maximum size of a network is given by the number of addresses that are possible with the remaining, least-significant bits below the mask prefix. See the mask table


Network - Partition


You can bind a whole subnet on one machine. See subnet binding

Recommended Pages
Card Puncher Data Processing
Aws - Subnet

in Aws A subnet is a sub-component of a Virtual Private Cloud For High availbility, you want to create them in different AWS Availability Zones (AZ) across multiple physical facilities in an AWS...
Card Puncher Data Processing
Broadcast Domain

The is defined on the host by an IP address and a Subnet mask IP: Subnet Mask
Card Puncher Data Processing
Classless Inter-Domain Routing (CIDR)

is a notation that defines a subnet (ip net range) CIDR notation: where: IP Address is a prefix is the subnet mask prefix length. where: is the wildcard IP address that match...
74hc00 Circuit
Device - Network Router

Router are devices that allow traffic to be exchanged subnetworks
Data System Architecture
Distributed System - Network Partition

Network partition in the context of distributed system. For a subnet network partition, see A network partition refers to a network split between nodes due to the failure of network devices. Example:...
Spf Dns Zone
Email - Sender Policy Framework (SPF)

SPF is a dns record that defines which server(s) may send an email. It describe the set of hosts which are designated outbound mailers for the domain. SPF is part of the mail authentication scheme with...
Chrome Site Cant Be Reached
How to allow the Cloudflare HTTP traffic to your Origin Server with Firewalld (iptables)

This article is a step by step that shows you how to configure the firewall Firewalld to allow the network packet traffic from a subnet such as Cloudflare
How to restrict your firewall by country firewalld (ie iptable)

A step by step on how to configure your iptable firewall with firewalld to allow only request from a country
Gcp Sql Gerardnico Public Ip
MySql - Google Cloud Platform Database Creation and Connection

Article the connection to a MySQL GCP (Google Cloud Platform) database with: the IP configuration (Private or Public access) Ssl and a...
Card Puncher Data Processing

This section group all articles over networking. In the internet age, all networks may be considered as subnet. To transmit data between two hosts in one network, you need two network adapters (network...

Share this page:
Follow us:
Task Runner