Subnet
IPv4 address plus CIDR prefix → network, broadcast, usable range.
Usable hosts
254
Network192.168.1.0
Broadcast192.168.1.255
First host 192.168.1.1
Last host 192.168.1.254
Mask255.255.255.0
Wildcard0.0.0.255
Class C
Supernet
Aggregate multiple CIDR blocks into a summary route.
Summary CIDR
10.0.0.0/22
Mask 255.255.252.0
Network 10.0.0.0
Broadcast 10.0.3.255
Host count 1,022
Wildcard Mask
CIDR ↔ subnet mask ↔ wildcard. For ACL and routing reference.
CIDR /24
Subnet mask 255.255.255.0
Wildcard 0.0.0.255
Mask (binary) 11111111.11111111.11111111.00000000
I know
CIDR
Prefix length → mask, wildcard, and host count.
Usable hosts
254
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Total addresses256
Base converter
Type in any row — the others update. No prefixes required.
Bandwidth
File size, bitrate, and time. Decimal units (1 MB = 106 B).
Download time
6m 40s
Size unit
Rate unit
Solve for