/24IP CIDR Calculator
Calculate network, broadcast, subnet mask, host range, and address count from CIDR notation (IPv4 and IPv6)
Examples:
Network
192.168.1.0/24
Broadcast
192.168.1.255
Subnet Mask
255.255.255.0
Wildcard
0.0.0.255
First Host
192.168.1.1
Last Host
192.168.1.254
Host Range
192.168.1.1 – 192.168.1.254
Total Addresses
256
Usable Hosts
254
Binary Mask
11111111.11111111.11111111.00000000
IP CIDR Calculator Guide
CIDR Calculator takes a CIDR notation like 192.168.1.0/24and instantly returns the network address, broadcast, subnet mask, wildcard, host range, total & usable addresses, and the binary mask. Great for designing VPC subnets, drafting ACLs, debugging routing, and validating firewall rules.
Common Private Ranges
| CIDR | Description |
|---|---|
| 10.0.0.0/8 | Large private network (Class A) |
| 172.16.0.0/12 | Medium private network (Class B) |
| 192.168.0.0/16 | Home / small private (Class C) |
| 169.254.0.0/16 | Link-local (auto-assigned) |
| fe80::/10 | IPv6 link-local |
Use Cases
- Sizing AWS VPC subnets and checking host counts
- Detecting CIDR collisions between Kubernetes Pod/Service ranges
- Deriving wildcard masks for firewall and Security Group rules
- Debugging BGP/OSPF routing tables