CIDR /17 Subnet Mask Reference & Calculator

Calculate the usable hosts, broadcast address, and subnet mask for a /17 network block dynamically.

Processed completely client-side. No data is saved or transmitted.

Interactive Visual Subnet & CIDR Partition Engine

Calculate subnets, CIDR ranges, subnet masks, and host details with a visual layout map.

Base Network IP

Parent CIDR (/24)

Split Subnet CIDR (/26)

Calculated Partition Table

Showing up to 128 subnets. Split size yields 4 total networks.

Subnet #	Network Address	Usable IP Range	Broadcast IP	Usable Hosts

Disclaimer: This utility provides generalized structural templates. It does not constitute legal representation or advice. No attorney-client relationship is created.