What information does the subnet calculator provide?

It calculates Network Address, Broadcast Address, Subnet Mask, Wildcard Mask, First/Last Usable Host IP, Total and Usable Host Count, IP Class, and 32-bit Binary representations.

Does it support all CIDR prefixes (/0 to /32)?

Yes. All subnet prefixes from /0 through /32 are supported, including special /31 point-to-point links (RFC 3021) and single /32 host masks.

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Developer Utilities

IPv4 Subnet Calculator

Calculate network address, broadcast, usable host IP range, subnet mask, and CIDR.

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IPv6 Subnet & Prefix Calculator

Expand, compress, and calculate IPv6 prefix ranges, CIDR subnets, and address types

MAC Address Generator & Formatter

Generate random unicast/multicast MAC addresses with colon, hyphen, or Cisco notation

IPv4 CIDR Calculator

Calculate IPv4 network ranges, masks, broadcasts, and usable hosts

How to Use IPv4 Subnet Calculator

Enter an IPv4 address (e.g. 192.168.1.100).
Select the subnet mask prefix (/0 to /32) from the dropdown.
Inspect the automatically calculated network metrics and binary breakdown.
Click "Copy Summary" to copy the complete subnet details to your clipboard.

Frequently Asked Questions

What information does the subnet calculator provide?: It calculates Network Address, Broadcast Address, Subnet Mask, Wildcard Mask, First/Last Usable Host IP, Total and Usable Host Count, IP Class, and 32-bit Binary representations.
Does it support all CIDR prefixes (/0 to /32)?: Yes. All subnet prefixes from /0 through /32 are supported, including special /31 point-to-point links (RFC 3021) and single /32 host masks.

Sources & References

Primary references: RFC 791: Internet Protocol; RFC 4632: Classless Inter-domain Routing.

Review policy: references and behavior notes are checked whenever the tool implementation changes.