Root zone
These servers manage the DNS root zone
all servers delegate to
edu.
These servers manage the edu zone
all servers delegate to
columbia.edu.
These servers manage the columbia.edu zone
Inconsistent responses
We queried these DNS servers, but not all of them returned the same response. Select a group to see their response.
adcu.columbia.edu.
These servers manage the adcu.columbia.edu 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 adcudev.adcu.columbia.edu zone, which contains adcudevdc08.adcudev.adcu.columbia.edu
This server timed out.
This server refused the query.