addr.tools - possibly useful tools for the Internet
challenges.addr.tools | dns-01 ACME challenge helper zone |
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dyn.addr.tools | simple dynamic DNS for your own domains, no account required |
header-echo.addr.tools | view HTTP request headers, modify HTTP response headers |
info.addr.tools | explore identifying information for domain names and IP addresses |
ip.addr.tools | construct domain names that resolve to any given IP address |
myip.addr.tools | get your external IP address |
dnscheck.tools | identifies your DNS resolvers, checks DNSSEC validation, and more |
On reddit, u/dnschecktool