CIDR/subnet breakdown with network, broadcast, host range, and class
Subnet Input
Subnet Details
Network Address
10.0.0.0Broadcast Address
10.0.0.255First Usable Host
10.0.0.1Last Usable Host
10.0.0.254Netmask (dotted)
255.255.255.0Netmask (hex)
0xFFFFFF00Wildcard Mask
0.0.0.255CIDR Prefix
/24Total Addresses
256Usable Hosts
254Address Class
AAbout IPv4 Subnetting
CIDR Notation
CIDR (Classless Inter-Domain Routing) uses the format IP/prefix, where the prefix is the number of leading 1 bits in the subnet mask. A /24 equals 255.255.255.0.
Usable Hosts
Most subnets reserve the network and broadcast addresses, leaving 2^(32-prefix) - 2 usable hosts. /31 point-to-point links (RFC 3021) and /32 single hosts are special cases with no reserved addresses.