Overview

You may use a variety of free tools to troubleshoot your website or any connectivity issues you may be experiencing.

Before contacting assistance, you can use the services listed in this article to troubleshoot your site. If you still need assistance, be sure to mention the findings of any tests you’ve performed.
General
General \sarchive.org – Use online-domain-tools.com to see how a website looked on a given date in the past. — A set of internet tools for testing and troubleshooting your website
mxtoolbox.com — A collection of troubleshooting tools (many of which are email-related) for your services
Domain registration
whois.online-domain-tools.com is a domain registration service. – hexillion.com WHOIS lookup – whois.domaintools.com whois lookup — A WHOIS lookup is a service that allows you to seek up information about
Lookup of nameservers – Lookup of the registrar and nameservers
whoisrequest.com – Displays changes to nameservers in the past.
DNS tools
Lookups of DNS records in general
Centralops.net – Several DNS tests
Network-tools.com – Several DNS tests
Lookup of many records – Select from a list of records to look up with ease.
Lookup of nameservers — Used to look for information about nameserver records.
CNAME \sitools.subhashbose.com – mxtoolbox.com CNAME record search – Lookup of the CNAME record
SRV \sitools.subhashbose.com – Mxtoolbox.com SRV record lookup – Lookup of SRV records
TXT \sitools.subhashbose.com – mxtoolbox.com TXT record lookup – Lookup of TXT records
Email tools
centralops.net – Check/resolve a single email address
verify-email.org – Check to see if an email address exists.
toolbox.googleapps.com – Analyzer of message headers
MX
mxtoolbox.com – toolbox.googleapps.com MX record lookup – MX record test by Google
SPAM
regex101.com – A regular expression tester that you may use in your panel to create custom message filters online-domain-tools.com – Check the mxtoolbox.com blacklist – Lookup IP address on blacklist
IP address lookup
IP address, hostname, ASN, and more at ipinfo.io
whatismyip.com – Displays the IP address that your computer is using. whatismyipaddress.com – Displays the IP address that your machine is using. – Find an IP address’s global location.
IPlocationfinder.com is a website that allows you to look up the global location of an IP address.
Network tools
Ping
All of the URLs below provide IPv4 ping tests:

Centralops.net
Through the Looking Glass
traceroute6.net
Traceroute
IPv4 traceroute testing are available at the following websites:

centralops.net
a magnifying glass
traceroute6.net
IPv6 test-ipv6.com — Displays the IPv6 connection of your machine.
IPv6 ping
All of the links below provide IPv6 ping tests:

subnetonline.com
a magnifying glass
centralops.net
traceroute6.net
IPv6 Traceroute
All of the links below provide IPv6 traceroute tests:

traceroute6.net \slooking

-glass \sitools.subhashbose.com
Proxy sites
You can use a proxy site to access your website from a different location. You can utilize a proxy site in France, for example, to see how and whether your site is resolving in that country. A few popular proxy sites are listed below:

Check to see whether the website is down.
Kproxy.com
Megaproxy.com
SSL software
sslshopper.com – Checks the validity of your SSL certificate
ssllabs.com – Examines whynopadlock.com’s SSL certificate — Lists the files on your site that are accountable for an unsafe SSL padlock.