SubnetCalc

SubnetCalc is used to analyze IPv6 and IPv4 subnets, CIDR blocks, and IP ranges. For CIDR networks, it provides host counts, network and broadcast addresses, relevant IP flags (e.g., private, loopback), and the associated IANA allocation with description. IP ranges can be automatically split into the minimal set of required CIDR blocks. Logged-in users can additionally download complete host IP lists as a plain text file.

Result

Network Host-Addresses Host-Addresses Count Designation Flags

On binsec.tools you will find free online tools for pentesting, which are also used within the binsec group conducting real penetration tests. The free pentest tools are primarily used to collect information and enrich these with other data. The pentest tools of binsec.tools do not carry out active attacks against target systems themselves.

binsec group - The Enterprise Pentesting Ecosystem

The German binsec group unifies high-end pentesting services, hands-on professional training labs, and innovative pentesting software solutions and tools. Operating as the technical core, binsec GmbH has delivered expert-led, human penetration testing since 2013. Rejecting automated scans, our permanently employed, certified senior experts perform manual deep-dive assessments for high-risk sectors like Payment, Banking, and Healthcare. The technological foundation of all engagements is driven by our proprietary, automated reporting framework PTDoc, under active development by binsec systems GmbH, ensuring a fully transparent, highly efficient penetration testing workflow from initial validation to final remediation.

Company

binsec systems GmbH
Clemensstraße 6-8
60487 Frankfurt am Main
Germany

Legal notice

Director: Patrick Sauer, Florian Zavatzki
Registration: Frankfurt am Main, HRB 118471
Turnover Tax Identification No.: DE 328 921 182

© 2026 All rights reserved by binsec systems GmbH.

© 2026 All rights reserved by binsec systems GmbH.