Running on your device · 0 bytes uploaded

# Network tools

IPv4 and IPv6 subnetting, classification, planning, and reference — computed exactly from parsed values, never from a lookup service. Nothing leaves your tab.

- [IPv4 subnet calculator

Network, broadcast, mask, wildcard, host counts — exact BigInt math on your CIDR.
](/network/ipv4-subnet)
- [IPv6 expand & compress

Expand, compress, and canonicalize IPv6 — RFC 5952 rules applied and named.
](/network/ipv6-format)
- [IPv6 prefix calculator

First and last address, exact 2^n capacity, arpa prefix — for any /0–/128.
](/network/ipv6-subnet)
- [IP range classifier

Private, reserved, or special-purpose — checked against a dated IANA registry snapshot.
](/network/ip-classify)
- [IP number forms

IPv4/IPv6 as integer, hex, and binary — exact both directions.
](/network/ip-numbers)
- [VLSM planner

Allocate unequal subnets from one base — every sizing decision visible as a step.
](/network/vlsm)
- [Subnet split & aggregate

Split a block into equal children, or merge siblings back — preconditions refused honestly.
](/network/subnet-split)
- [MAC & EUI-64

Every MAC notation, the U/L and group bits named, the EUI-64 and its fe80:: derivation.
](/network/mac-eui64)
- [Port reference

A dated, curated IANA port snapshot — search numbers, names, and protocols.
](/network/ports)
- [Bandwidth calculator

Transfer time at a line rate — exact fractions, both unit bases, no fake efficiency.
](/network/bandwidth)

10 tool s · everything is computed locally, nothing leaves your device.

---

Canonical HTML: https://nutter.tools/network
Markdown version: https://nutter.tools/network/index.md
Plain-text version: https://nutter.tools/network/index.txt
Agent index: https://nutter.tools/llms.txt