Network
IPv4/IPv6 calculators, MAC address tools, subnet utilities. — 6 tools
IPv4 Subnet Calculator
Runs locally
Calculate subnet mask, CIDR, network, broadcast, usable range.
IPv4 Address Converter
Runs locally
Convert IPv4 address between decimal/binary/hex/integer formats.
IPv4 Range Expander
Runs locally
Expand IPv4 ranges/CIDR into addresses or summarized ranges.
MAC Address Lookup
Runs locally
Lookup MAC vendor/OUI.
MAC Address Generator
Runs locally
Generate random MAC addresses.
IPv6 ULA Generator
Runs locally
Generate IPv6 Unique Local Address prefixes.