matrix.brunico.com has no NS records.
NS records for this zone are defined at brunico.com.
NS records for this zone are defined at brunico.com.
Question and response
Question
dig matrix.brunico.com. NS
Answer
The response has no answer records.
Authority
brunico.com. 300 SOA ns-1562.awsdns-03.co.uk. awsdns-hostmaster.amazon.com. 1382477856 43200 10800 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0