Network Diagnostics

Network Diagnostics groups 5 free tools with no sign-up to follow and test a connection. Traceroute shows the network path hop by hop, TCP Port Test checks a public service, and Common public ports scans the main services exposed by a domain. Reverse DNS lookup finds the name linked to an IP, while Full domain diagnostics checks DNS, email and HTTPS availability. Useful for administrators and webmasters.

For a path issue, start with Traceroute. If a service seems unreachable, TCP Port Test targets a specific port, while Common public ports gives a wider view. When you start from an IP address, Reverse DNS lookup provides the associated name. Finally, Full domain diagnostics groups several checks around a domain. Choose based on whether you need to follow, test, reverse or summarize.

How to use

  1. Begin with Traceroute if the path seems slow or interrupted, then note the first hop that stops responding.
  2. If a specific service is doubtful, use TCP Port Test on an authorized port, then Common public ports to widen the check.
  3. When you start from an IP address, run Reverse DNS lookup to find the associated name and confirm the target.
  4. Finish with Full domain diagnostics to group DNS, email and HTTPS availability in one reading.

Frequently asked questions

Where should I start a network diagnosis?

Start with Traceroute if you want to see the network path, or TCP Port Test if a specific service seems unavailable. For a broader view, Common public ports tests the main exposed services. Full domain diagnostics is then useful for a summary around a domain.

Can I test a port without installing software?

Yes, TCP Port Test lets you test a public service on an authorized port from the browser. The tool is free and requires no sign-up. It pairs well with Traceroute or Common public ports when you are trying to isolate a blockage.

What should I do if Traceroute stops before the end?

Note the last visible hop and compare with Common public ports to see whether a service still answers. TCP Port Test can confirm a specific port. If the domain is involved, Full domain diagnostics helps separate DNS, email and HTTPS.

Does Reverse DNS lookup replace IP address Whois?

No. Reverse DNS lookup finds the name associated with an IP address. IP address Whois gives the registry and network. Both complement each other when you need to identify an address seen in a log.

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