ip21.net116.ipam.itbatera.euskadi.eus has no NS records.
NS records for this zone are defined at euskadi.eus.
NS records for this zone are defined at euskadi.eus.
Question and response
Question
dig ip21.net116.ipam.itbatera.euskadi.eus. 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