Network
IP, MAC, DNS, and subnet utilities
IPv4 Subnet Calculator
Calculate network details from CIDR notation
Subnet Calculator
Split networks into subnets
IPv4 Address Converter
Convert IPv4 between dotted, decimal, hex, and binary
IPv4 Range Expander
Expand a CIDR or IP range into addresses
MAC Address Lookup
Look up vendor from MAC OUI prefix
MAC Address Generator
Generate random MAC addresses
IPv6 ULA Generator
Generate IPv6 Unique Local Addresses
IPv6 Calculator
Expand, compress, and inspect IPv6 addresses
DNS Lookup
Resolve DNS records for a hostname