Network
Subnet Calculator
Enter an IP address and prefix (like 192.168.10.37/24) to get the network address, broadcast address, and usable host range instantly. Pick common prefixes from quick chips or a reference table, and copy the results with one click.
서브넷 계산기, CIDR 계산기, IP 서브넷, subnet calculator, cidr calculator, ip subnet mask, network address calculator, subnet mask calculator- Created
- 2026.09.05
- Updated
- 2026.09.16
Subnet Calculator192.168.10.0/24 · 254
Input
e.g. 10.0.0.0 · prefix 8Common prefixes
Valid IPv4 address · Class C
Result
Private address rangeNetwork address192.168.10.0/24
Broadcast192.168.10.255
Usable host range192.168.10.1 — 192.168.10.254254 usable · 256 total
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Prefix length/24
Input address192.168.10.37
First host192.168.10.1
Last host192.168.10.254
IP classC
Address typePrivate (RFC 1918)
Prefix reference
IPv4PrefixSubnet maskTotal addressesHosts
/31 and /32 don't reserve a separate network/broadcast address, so host counting works differently for them. The actual number of usable addresses can vary with device configuration and reserved-address policy. IPv6 isn't supported.
Favorites Ctrl + N
How to use
1.
Enter an IP address and prefix (e.g. 192.168.10.37/24).
2.
Or pick a value straight from the common-prefix chips or the prefix reference table.
3.
Check the network address, broadcast, and usable host range, then save it with the copy button.
Related updates View all
FAQ
Tool info
Category Network
Processing Directly in your browser
Data storage Not stored
Created 2026-09-05
Updated 2026-09-16