Subnet Calculator Quick Guide for Developers

5/12/2026 • 1 min read • TOOLBASE Team

CIDR in plain English

/24 means 24 network bits and 8 host bits.

Example

For 192.168.10.0/24:

  • Network: 192.168.10.0
  • Broadcast: 192.168.10.255
  • Usable hosts: 254

Useful tips

  • /30 is common for point-to-point links.
  • /31 and /32 have special routing use-cases.
  • Validate ranges before firewall changes.