🔢 Subnet Calculator

Calculate subnets, host ranges, and network details instantly

IP Address & Subnet Configuration

Enter IPv4 address (e.g., 192.168.1.0)
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📖 Quick Reference

Common CIDR Notations

CIDR Subnet Mask Usable Hosts
/24255.255.255.0254
/25255.255.255.128126
/26255.255.255.19262
/27255.255.255.22430
/28255.255.255.24014
/29255.255.255.2486
/30255.255.255.2522

IP Address Classes

Class Range Default Mask
A1.0.0.0 - 126.255.255.255/8
B128.0.0.0 - 191.255.255.255/16
C192.0.0.0 - 223.255.255.255/24
D224.0.0.0 - 239.255.255.255Multicast
E240.0.0.0 - 255.255.255.255Reserved

Private IP Ranges

Class Range CIDR
A10.0.0.0 - 10.255.255.25510.0.0.0/8
B172.16.0.0 - 172.31.255.255172.16.0.0/12
C192.168.0.0 - 192.168.255.255192.168.0.0/16

Special IP Addresses

Address Purpose
0.0.0.0/8Current network
127.0.0.0/8Loopback
169.254.0.0/16Link-local (APIPA)
224.0.0.0/4Multicast
255.255.255.255Broadcast
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