NetOps Tools

All tools

The full kit

6 browser-only utilities, grouped by layer — pick one to get started, or press ⌘K to jump straight to it.

Addressing

AddressingSubnet Calculator→Break a CIDR into network, broadcast, host range and mask — with a bit-level view.AddressingVLSM Planner→Carve a block into right-sized subnets, largest-first, no wasted space.AddressingIPv6 Toolkit→Expand, compress, and derive EUI-64 interface identifiers.

Layer 2

Layer 2MAC / OUI→Normalise a MAC, read its flags, and resolve the OUI vendor.

Live lookups

Live lookupsDNS Lookup→Resolve live records over DNS-over-HTTPS — A, AAAA, MX, TXT and more.

Reference

ReferencePort Reference→A searchable map of the ports you actually hit day to day.

Browser-only utilities · no login, no tracking · press ⌘K anywhere to jump to a tool.