Packetry

IPv4 Subnet Calculator

Network, broadcast, host range from IP and CIDR. Cloud-aware.

128-bit subnet calculations with all IPv6 notations.

Convert between subnet mask, wildcard mask, and CIDR prefix. Binary view included.

Convert IPv4 addresses between decimal, binary, hex, octal, and integer.

Merge CIDR lists into minimal supernets.

Variable-length subnet allocation from a parent CIDR.

Calculate MSS from MTU and encapsulation layers. Visual packet diagram.

Draft implementations of emerging or non-standard protocols.

Experimental calculator for IPv8 addresses from draft-thain-ipv8-00 with ASN Dot and dotted parsing.