1. MXTOOLBOX:
One of the most popular website to check MX Records, Blacklist Status, SPF, DKIM, DNS, OPEN Ports etc …
website: http://www.mxtoolbox.com
2. WHATISMYDNS:
Want to check the global propogation status of your DNS records ? WHATISMYDNS is the right online tool
website: http://www.whatismydns.net
3. HOST-TRACKER:
Want to know whether your website is accessible globally ? HOST-TRACKER is the right tool
website: http://www.host-tracker.com/
4. SPFWIZARD:
Need to create an SPF and does not know how to do it, SPFWIZARD is the right tool for you
website: http://www.spfwizard.net/
5. PINGDOM:
Want to know your website performance and speed report, PINGDOM is the right tool
website: http://tools.pingdom.com/
6. INTODNS:
INTODNS makes it very easy to diagnose the DNS health of any domain
website: http://intodns.com/
7. UPTIMEROBOT:
Want to monitor a website for downtime ? UPTIMEROBOT is your tool, free to signup and 50 free monitors at a 5minite interval checks.
website: https://uptimerobot.com/
8. PING.EU:
PING.EU contains all the popular network tools like PING, TRACEROUTE, DNS Lookup, PORT Check, PTR Lookup etc …
website: http://ping.eu/
9. CENTRALOPS:
Ping, TRACEROUTE, TCP Query, Who.is, Domain check using CENTRALOPS.
website: https://centralops.net
10. WHOIS:
Domain Registration, WHOIS, Nameserver and DNS lookup tool
website: https://who.is/