avast dot com DNS check test with errors since 2015-03-06 03:35:28 (last green)!

Viruses and worms
1

See link: http://dnscheck.pingdom.com/troubleshooting.php?domain=avast.com&timestamp=1429896302&view=1
Nameserver: ns-01.avast.com.

Reverse for 206.190.141.92 points to an unknown host name (206.190.141.92.static.midphase.com).

The PTR record for the address points to an unknown host name.

Fail on consistency: 2 different SOA records found.

The SOA record are not the same among all name servers. This is usually due to misconfiguration.

polonus