gm.ib.routit.net has no NS records.
NS records for this zone are defined at ib.routit.net.
NS records for this zone are defined at ib.routit.net.
Question and response
Question
dig vgm.ib.routit.net. NS
Answer
The response has no answer records.
Authority
ib.routit.net. 900 SOA auth01-peer.ib.routit.net. noc.routit.nl. 135 3600 1800 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0