Networking & IT
Subnet math, chmod, cron, IPv6, email DNS records, and HTTP/port references.
CIDR & Subnet Calculator
Network, broadcast, wildcard, usable range, and host counts.
networking⌘↵
chmod Permissions Calculator
Owner/group/public rwx plus setuid, setgid, and sticky — octal, symbolic, and chmod command.
networking
Cron Schedule Parser
Human-readable cron descriptions plus the next five run times.
networking⌘↵
SPF / DKIM / DMARC Builder
Build and validate email authentication DNS records with lookup budgets and issue flags.
networking⌘↵
IPv6 Expander & Compressor
Expand, compress, and analyse IPv6 addresses with prefix math and address counts.
networking⌘↵
HTTP Status & Ports Reference
Searchable HTTP status codes and common TCP/UDP ports — keyboard-first.
networking