Tools

Handy network utilities.

• Tool

  IP address

  See the IP address you are connecting from.

  Open tool

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  HTTP headers

  Fetch a URL and show its HTTP response headers.

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  Whois

  Look up registration details for a domain or IP address.

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  ASN

  Find the network (autonomous system) an IP address belongs to.

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  DNS lookup

  Query DNS records for a domain.

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  DNS propagation

  Compare DNS answers across major public resolvers.

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  Email deliverability

  Check MX, SPF, DMARC and DKIM records for a domain.

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  Ping

  Check whether a host responds, and how quickly.

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  Traceroute

  Trace the network path from this server to a host.

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  MTU and path check

  Find the path MTU to a host over IPv4.

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  Port check

  Test whether a TCP port is open on your own IP address.

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  TLS certificate

  Inspect the TLS certificate a server presents.

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  Certificate expiry

  See when a TLS certificate expires.

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  Speed test

  Download a test file to gauge your connection speed.

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