Network debugging tools

Tools - Resolve.rsresolve.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?