Ideambox
All tools
TOOL IDB-SWE-022
IPv4 subnet

Desktop only

Engineering tools are available only on desktop screens.

IPv4 subnet calculator

CIDR ↔ netmask, network and broadcast addresses, host range, total hosts, wildcard mask, and IP class. Validates RFC 1918 private ranges.

Network / host split /24
octet 1 octet 2 octet 3 octet 4 IP NET HOST subnet range network broadcast — hosts
Engineering notes

CIDR notation

  • /24 = 255.255.255.0 = 256 addresses, 254 usable hosts.
  • /30 = point-to-point link, 2 usable hosts.
  • /32 = single host route. /31 = RFC 3021 point-to-point (2 hosts).

RFC 1918 private ranges

  • 10.0.0.0/8
  • 172.16.0.0/12
  • 192.168.0.0/16

Result

Live