Quiz - First Cagayan Converge Data Center Subnetting Pro

User Guide

Analyze any IPv4 address to view its Class (A, B, C, etc.), Type (Public/Private), Binary representation, and Hexadecimal value.

This unified tool helps you calculate subnets and assign IP addresses to devices in one place.

Step 1: Enter a Base Network (e.g., 192.168.1.0/24).
Step 2: Choose to subnet by "Number of Hosts" or "Number of Networks" and enter the required value.
Step 3: Click Calculate Subnet to see network details (Range, Broadcast, etc.).
Step 4: Once calculated, use the "Host IP Assignment" section below to add devices (PCs) and assign them specific IPs (e.g., 5th available IP).

Tip: Use the "Load Example" button to see a demo configuration.

Calculate Variable Length Subnet Masks for networks with different size requirements.

Add Requirements: Enter your base network, then add subnets with different host counts (e.g., Sales: 50 hosts, IT: 10 hosts).
Host Finder: Use the "Find" button in the results table to quickly locate the Nth IP in any specific subnet.

Print Report: Generate a professional PDF-ready report of your current results.

Reset: Clear all data in the current tool to start over.

CIDR	Subnet Mask	Total IPs	Usable Hosts
/32	255.255.255.255	1	0
/31	255.255.255.254	2	0*
/30	255.255.255.252	4	2
/29	255.255.255.248	8	6
/28	255.255.255.240	16	14
/27	255.255.255.224	32	30
/26	255.255.255.192	64	62
/25	255.255.255.128	128	126
/24	255.255.255.0	256	254
/23	255.255.254.0	512	510
/22	255.255.252.0	1,024	1,022
/21	255.255.248.0	2,048	2,046
/20	255.255.240.0	4,096	4,094
/19	255.255.224.0	8,192	8,190
/18	255.255.192.0	16,384	16,382
/17	255.255.128.0	32,768	32,766
/16	255.255.0.0	65,536	65,534
/8	255.0.0.0	16,777,216	16,777,214

* /31 is typically used for point-to-point links.

Class	Range (First Octet)	Default Subnet Mask	Purpose
A	1 – 126	255.0.0.0 (/8)	Large Networks
B	128 – 191	255.255.0.0 (/16)	Medium Networks
C	192 – 223	255.255.255.0 (/24)	Small Networks
D	224 – 239	N/A	Multicast
E	240 – 255	N/A	Experimental

These addresses are reserved for internal networks and are not routable on the public internet.