Test results for: https://greenrobot.com
DNS (IPv6 NS)
PASS
Hostname greenrobot.com does have IPv6-addressed nameservers defined.
DNS (IPv6 TLD NS)
PASS
Hostname top-level domain (com.) does have IPv6-addressed nameservers defined.
DNS (IPv4 A Record)
PASS
Hostname greenrobot.com does have an IPv4 A record (104.237.138.56).
DNS (IPv6 AAAA Record)
PASS
Hostname greenrobot.com does have an IPv6 AAAA record (2600:3c00::f03c:91ff:fe84:6879).
DNS (MX Record)
PASS
Hostname greenrobot.com has at least one MX with AAAA record (2600:3c00::f03c:91ff:fe84:6879, 2607:f8b0:4001:c56::1b, 2607:f8b0:4003:c04::1b, 2607:f8b0:4023:c0d::1a, 2a00:1450:4013:c16::1a, 2a00:1450:4025:401::1a).
DNS (Glue)
PASS
Glue does not appear to be needed; nameserver configuration for greenrobot.com is not self-referencing.
IPv4 Connectivity
PASS
Successfully connected to greenrobot.com on port 443 over IPv4.
IPv6 Connectivity
PASS
Successfully connected to greenrobot.com on port 443 over IPv6.
IPv4 Literals
WARN
Could not establish connection to URL https://greenrobot.com.