ZovaTool

IP Subnet Calculator

Network
192.168.1.0
Broadcast
192.168.1.255
Subnet Mask
255.255.255.0
Wildcard
0.0.0.255
Usable Hosts
254
Total Addresses
256

Host Range & Identity

First Host192.168.1.1
Last Host192.168.1.254
ClassC
TypePrivate (RFC1918)
Hex0xC0A8010A
Integer3232235776

Binary

IP11000000.10101000.00000001.00001010
Mask11111111.11111111.11111111.00000000

VLSM — Split into equal subnets

#NetworkRangeHosts
1192.168.1.0/26192.168.1.1 – 192.168.1.6262
2192.168.1.64/26192.168.1.65 – 192.168.1.12662
3192.168.1.128/26192.168.1.129 – 192.168.1.19062
4192.168.1.192/26192.168.1.193 – 192.168.1.25462

How to use the IP Subnet Calculator

  1. Enter any IPv4 address.
  2. Choose a CIDR prefix (/0–/32) or click a preset.
  3. Read network, broadcast, mask, wildcard, first/last host, total/usable addresses, class and public/private status.
  4. Binary view shows the IP and mask bit-by-bit.
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Subnetting in 60 seconds

A subnet mask separates the network bits from the host bits. /24 means the first 24 bits identify the network and the remaining 8 bits identify hosts (256 addresses, 254 usable).

Private RFC1918 ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16. Anything else is publicly routable.

Use /30 for point-to-point links (2 usable hosts), /31 for modern P2P (RFC 3021), /29 for tiny LANs.