Free tool
DNS checker
Enter a hostname. We resolve it from Frankfurt, count the addresses, and look up the domain's expiry in RDAP.
Does missing IPv6 hurt?
Not today for most visitors, but a growing share of mobile networks are IPv6-first and reach IPv4-only sites through a translation layer that adds latency.
Why check domain expiry with a DNS tool?
Because an expired domain is the one DNS failure no fix on the server repairs, and the expiry date is public in RDAP.