IP / CIDR
Paste an IPv4 address with optional prefix (e.g. 192.168.1.10/24) and inspect the network.
- CIDR
- Address
- Netmask
- Wildcard
- Network
- Broadcast
- First host
- Last host
- Total addr
- 256
- Usable hosts
- 254
- Class
- C
- Scope
- Private (RFC 1918)
Binary
- Address
- 11000000.10101000.00000001.00001010
- Mask
- 11111111.11111111.11111111.00000000
- Network
- 11000000.10101000.00000001.00000000
Contains
inside 192.168.1.0/24
Notes
- IPv4 only for now.
- Usable host count subtracts network + broadcast for /30 and shorter. /31 follows RFC 3021 (2 hosts), /32 is a single host.
- Click any value to copy it.
- Pure JavaScript bitmath — your input never leaves the browser.