Network & Infrastructure
Subnet calculators, DNS lookups, IP tools, and other network utilities.
Subnet/CIDR Calculator
Calculate network address, broadcast address, usable hosts and more from any IP/CIDR input.
IP Address Converter
Convert between decimal, binary, hex, and integer IP address formats.
CIDR Range Visualiser
Visualise IP ranges and see overlap between CIDR blocks.
VLAN Calculator
Plan VLAN subnetting and calculate usable address ranges.
Bandwidth Calculator
Convert between bandwidth units and estimate transfer times.
Port Reference
Quick reference for common TCP/UDP ports and their services.