Some servers does not provide A records for nameservers.
missing A record(s) for (ns1060.ui-dns.com,ns1060.ui-dns.biz,ns1060.ui-dns.org,ns1060.ui-dns.de) at nameserver 217.160.81.60
missing A record(s) for (ns1060.ui-dns.de,ns1060.ui-dns.com,ns1060.ui-dns.biz,ns1060.ui-dns.org) at nameserver 217.160.83.60
missing A record(s) for (ns1060.ui-dns.org,ns1060.ui-dns.de,ns1060.ui-dns.com,ns1060.ui-dns.biz) at nameserver 217.160.82.60
missing A record(s) for (ns1060.ui-dns.com,ns1060.ui-dns.de,ns1060.ui-dns.biz,ns1060.ui-dns.org) at nameserver 217.160.80.60