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IP Subnet Calculator

Calculate IP ranges, subnet masks, CIDR notation, and network details instantly.

Input

Quick Examples:

  • • Home Network: 192.168.1.0/24 (254 hosts)
  • • Small Office: 10.0.0.0/16 (65,534 hosts)
  • • Single Host: Any IP/32 (1 host)

Results

Network Address
192.168.1.0
Broadcast Address
192.168.1.255
First Host
192.168.1.1
Last Host
192.168.1.254
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
CIDR Notation
/24
Total Hosts
256
Usable Hosts
254
IP Class
C
IP Type
Private (Class C)

Binary Representation

IP Address:
11000000.10101000.00000001.00000001
Subnet Mask:
11111111.11111111.11111111.00000000
Network Address:
11000000.10101000.00000001.00000000

About IP Subnet Calculation

An IP subnet calculator helps network administrators divide networks into smaller subnetworks (subnets) for better organization, security, and performance. Understanding subnetting is essential for efficient network design and management.

Common CIDR Notations

  • /32 - Single host (1 IP)
  • /31 - Point-to-point link (2 IPs, RFC 3021)
  • /30 - Point-to-point link (4 IPs, 2 usable)
  • /24 - Standard Class C network (256 IPs, 254 usable)
  • /16 - Standard Class B network (65,536 IPs)
  • /8 - Standard Class A network (16,777,216 IPs)