Grox       whatmask - IP subnet/CIDR Calculator

Address/Mask: 

Examples: /24, 192.168.0.0/24, 255.255.255.0




For help with this form see the 
whatmask web site.




This tool uses Joe Laffey's 

whatmask program. Thanks, Joe!





You: 127.0.0.1      now: Wed 03/26/2025 05:42AM -0700

top of page