6 Calculators

Networking & IT Calculators

Subnetting, bandwidth, DNS TTL, VLAN planning, and other IT networking utilities for admins, developers, and certification prep.

Calculate network address, broadcast, host range, wildcard mask from IP and subnet.

Convert IP addresses between decimal, binary, hexadecimal, and integer formats.

Estimate transfer time from file size and speed, or calculate required bandwidth.

Plan VLAN subnets with VLSM allocation for departments and segments.

Search TCP/UDP port numbers by port or service name.

Convert Time to Live (TTL) between seconds and human-readable duration. DNS presets and expiry time calculator for sysadmins.