rocksecurityservice.com publishes IPv6 but doesn't answer on it.
Has both IPv4 (A) and IPv6 (AAAA) addresses.
F
IPv6 readiness
Publishes IPv6 but doesn't answer on it — worse than having none.
Website over IPv6 rocksecurityservice.com has an AAAA record, but nothing answered on ports 443 or 80. IPv6 visitors wait for a timeout before falling back to IPv4.
✗ 2a07:7800::134 no answer
broken
www over IPv6 www.rocksecurityservice.com has an AAAA record and answers on it.
✓ 2a07:7800::134 answers · 443
yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record.
mx.stackmail.com ✗
no
Nameservers have IPv6 No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
Fix or remove the AAAA record for rocksecurityservice.com Something published an IPv6 address but nothing answers on it, so IPv6 visitors wait for a timeout first. Either make the server listen on IPv6 (and allow ports 443/80 through its firewall), or delete the AAAA record until it does.
Mail servers without IPv6 mx.stackmail.com has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.
Nameservers without IPv6 ns3.serverbyt.in, ns2.serverbyt.in, ns4.serverbyt.in, ns1.serverbyt.in all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.