IPv4 Calculator

Freeform IPv4 Calculator, single-page app with additional inbuilt settings for RFC1918 address space.

Application designed and written by a Network Engineer with 20+ years experience in Enterprise Level infra, this calculator is for all IT Engineers to quickly discover the subnet allocation for a known host IP/netmask.

Pre-set settings for RFC 1918 (10/8, 172/16/12, 192.168.16) and a totally freeform setting. UI Sliders calculate the reference data each time they are adjusted allowing the user to quickly gain the key subnet reference data

Calculator provides:

Host IP

Subnet

Subnet Mask

Subnet Reference Data:

Mask Length

Subnet Address

Subnet Broadcast Address

Host Count

Inverse mask

Mask (in dotted decimal)