Test results for: http://onlinesim-ru.vercel.app
DNS (IPv6 NS)
WARN
Could not resolve nameservers for hostname onlinesim-ru.vercel.app.
DNS (IPv6 TLD NS)
PASS
Hostname top-level domain (app.) does have IPv6-addressed nameservers defined.
DNS (IPv4 A Record)
PASS
Hostname onlinesim-ru.vercel.app does have an IPv4 A record (216.198.79.67, 64.29.17.67).
DNS (IPv6 AAAA Record)
FAIL
Hostname does not have IPv6 AAAA record.
DNS (MX Record)
WARN
Hostname onlinesim-ru.vercel.app does not have MX records.
DNS (Glue)
WARN
Could not resolve nameservers for hostname onlinesim-ru.vercel.app.
IPv4 Connectivity
PASS
Successfully connected to onlinesim-ru.vercel.app on port 80 over IPv4.
IPv6 Connectivity
FAIL
Could not connect to onlinesim-ru.vercel.app on port 80 over IPv6.
IPv4 Literals
WARN
Could not establish connection to URL http://onlinesim-ru.vercel.app.