Network debugging tools

Tools - Resolve.rs

This site maintains a long list of tools to debug IP, DNS. Certificates and so on

Domains

• Top-level domains from ICANN

• Top-level domains from PublicSuffixList

• ICANN vs PublicSuffixList Top-level domains

• Usable top-level domains

• Nice top-level domains

• Calculate the public suffix for a hostname

• Convert to/from punycode

• Domain Name Finder

DNS

• DNS Lookup
• MX Check
• Open Resolvers
• Reverse DNS Lookup
• Which DNS server am I using?

HTTP

• HTTPS Certificate Check
• Headers: Mine (request), Server (response)
• Content-Type header values
• Redirection check
• URL encode/decode
• URL parser
• User Agent

TCP/IP

• ASN Lookup
• IP Geolocation
• TCP Ports
• TLS Certificate Check (aka SSL)
• What's my IP?