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 – Experts in Penetration Testing

With over 10 years of experience in penetration testing, binsec GmbH is a leading IT security company. Our team of certified experts identifies vulnerabilities in IT systems, web applications, and mobile apps – ensuring maximum protection against cyber threats.

Company

binsec systems GmbH
Solmsstraße 41
60486 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.