5 New Network Tools to Supercharge Your Workflow

TL;DR

5 new free network tools: WHOIS Lookup (domain ownership), Reverse DNS (IP to hostname), SSL Checker (certificate validation), Subnet Calculator (CIDR/network planning), and Email Header Analyzer (trace email routes). All free, fast, and privacy-focused—no signup required. Key Facts:

• WHOIS reveals domain expiration dates and registrar info
• Reverse DNS is critical for email deliverability troubleshooting
• SSL checker detects missing intermediate certificates
• Subnet calculator visualizes network ranges and host counts

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We are excited to announce a major update to JumpTools! We've just expanded our networking suite with 5 essential tools designed for developers, sysadmins, and security professionals.

Like all our tools, these are free, fast, and privacy-focused.

1. WHOIS Lookup

Instantly check domain registration details, expiration dates, and owner information for any domain.

• Why use it: Verify when a domain expires or who owns it.
• Key Feature: Supports all TLDs and provides raw WHOIS data.

Try it: Free WHOIS Lookup →

2. Reverse DNS (rDNS) Lookup

Convert an IP address back to a hostname using PTR records.

• Why use it: crucial for troubleshooting email deliverability and identifying unknown servers.
• Key Feature: Fast lookups directly from your browser.

Try it: Free Reverse DNS Lookup →

3. SSL Certificate Checker

Verify the security of any website's SSL/TLS connection.

• Why use it: Check if your certificate is expired, valid, or missing intermediate chains.
• Key Feature: Deep analysis of the certificate chain, cipher suites, and vulnerability detection.

Try it: Free SSL Certificate Checker →

4. Subnet Calculator

Simplify network planning with our visual Subnet Calculator.

• Why use it: meaningful for splitting IP networks or understanding CIDR notation (e.g., /24).
• Key Feature: Instantly see network address, broadcast address, and usable host range.

Try it: Free Subnet Calculator →

5. Email Header Analyzer

Troubleshoot email delivery issues by pasting raw headers.

• Why use it: Trace the path of an email (hops), identify delays, and verify SPF/DKIM/DMARC authentication.
• Key Feature: Visualizes server hops and highlights suspicion delays.

Try it: Free Email Header Analyzer →

Try Them Today

These tools are available right now under the Network category. We hope they help you debug faster and build better networks! Explore All Network Tools →