d.tld.ma has no NS records.
NS records for this zone are defined at tld.ma.
NS records for this zone are defined at tld.ma.
Question and response
Question
dig d.tld.ma. NS
Answer
The response has no answer records.
Authority
tld.ma. 900 SOA a.tld.ma. ma.anrt.ma. 47 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0