21.99.120.77.colo.static.dcvolia.com has no NS records.
NS records for this zone are defined at colo.static.dcvolia.com.
NS records for this zone are defined at colo.static.dcvolia.com.
Question and response
Question
dig 21.99.120.77.colo.static.dcvolia.com. NS
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0