Calculate IPv4 network, broadcast, mask and usable host ranges.
The browser uses local APIs already available on your device.
Ordinary page requests may still appear in access logs. Tool content is excluded from Analytics.See privacy proof →Subnet / CIDR Calculator is a browser-based utility designed to calculate IPv4 network, broadcast, mask and usable host ranges.
Enter an IPv4 address with a CIDR prefix. /31 follows point-to-point semantics; /32 represents one address.
/31 exposes both addresses for point-to-point use; /32 represents one address.
No. This calculates CIDR ranges; the converter changes address representations.
Calculate IPv4 network, broadcast, mask and usable host ranges. The expected result is network, broadcast, mask, usable range and host count.
Use an IPv4 address with a CIDR prefix. The page validates supported formats and explains known limits before or during processing.
No. Processing happens inside this browser tab and input content is not included in WhaleTu analytics.
Yes. No account is required.