Tools

Tools to simplify the way you manage and monitor your domains, websites, and networks.

The tools below are FREE for unlimited use.

Subnetting

Calculate the network details of an IPv4 subnet from an IP address or CIDR block.

Open Web Tool

API Docs API Tester

DNS Tools

Look up DNS records for any hostname, with history and record-by-record detail.

Open Web Tool

API Docs API Tester

Check WHOIS registration details for a domain.

Open Web Tool

API Docs API Tester

Validate a domain's SPF record and see how mail servers will read it.

Open Web Tool

API Docs API Tester

See the public IP address your connection is using right now.

Other Tools

Check up on a website or domain. Validate its SSL/TLS certificate.

Open Web Tool

API Docs API Tester

Convert numbers between binary, octal, decimal, and hexadecimal.

Open Web Tool

API Docs API Tester

Encode or decode with URL, Base64, or Base64URL encoding.

Open Web Tool

API Docs API Tester

These tools and their APIs are updated with each release of NetworkCalc. For details on changes, read the release notes.