Use this network utility to parse, normalize, convert, or derive IPv4, IPv6, subnet, reverse-DNS, or MAC addressing information under a stated prefix convention.

IP address

Required string input.

Subnet mask

Required string input.

Compute an IPv4 broadcast address from an address and subnet mask. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Broadcast address

The resulting broadcast address returned as a string.

• Syntax and arithmetic validity do not establish reachability, ownership, routing, DNS, privacy, or authorization. IPv4 special-use ranges, IPv6 scopes and compression, prefix boundaries, mapped forms, and host-count conventions require explicit handling.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Validate against current IANA registries and the target platform, test boundary prefixes, and use live network tools only with appropriate authorization.

• IPv4 Network Address Calculator

  Compute an IPv4 network address from an address and subnet mask.

• IPv4 CIDR Calculator

  Compute network address, broadcast, host range, and capacity for an IPv4 CIDR block.

• IPv6 Subnet Calculator

  Expand an IPv6 address, apply a prefix length, and derive the first address, last address, and exact address count. IPv6 has no broadcast address and does not subtract network or broadcast addresses from a prefix.