Websites (Diagnostics Assistance)

Device Related

• Microsoft Answers Support
• Microsoft Surface Diagnostic Toolkit (MS App Store)
• Apple Self-Service & Repair
• Apple Support
• iFixit Answers
• Tom’s Hardware Forums
• Tech Support Forum
• PC Repair Forum
• BadCaps Forum - Electronics Repair

Networks, Email, Domains, DNS, IP Lookup, etc.

• ping.canbeuseful.com - Looping Ping Test
• trt-netztest.at - Internet Loop Test
• packetstats.com - Internet Reliability Testing
• whatismyipaddress.com - Public IP Address Lookup
• whois.domaintools.com - Who IS & Other Domain Reverse Engineering
• dnschecker.org/domain-ip-lookup - Reverse IP Lookup from Domains
• mxtoolbox.com/DnsLookup.aspx - DNS Lookup/Traceroute

Blacklist Email Checking

• mxtoolbox.com/blacklists.aspx
• whatismyipaddress.com/blacklist-check