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Free tools · Networking
IPv4 Subnet Calculator
From an address to its network: subnet mask, wildcard, host range and binary representation.
All tools
IPv4 subnetting
VLSM plan
Converter
ACL helper
Address and prefix
IPv4 address (with optional /prefix)
CIDR prefix
/0
/1
/2
/3
/4
/5
/6
/7
/8
/9
/10
/11
/12
/13
/14
/15
/16
/17
/18
/19
/20
/21
/22
/23
/24
/25
/26
/27
/28
/29
/30
/31
/32
Calculate subnet
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