Root zone
These servers manage the DNS root zone
all servers delegate to
com.
These servers manage the com zone
all servers delegate to
21vianet.com.
These servers manage the 21vianet.com zone
Inconsistent responses
We queried these DNS servers, but not all of them returned the same response. Select a group to see their response.
These servers claim authority over the 21vianet.com zone, which contains spf.21vianet.com
These servers timed out.