alt.5nine.com has no NS records.
NS records for this zone are defined at 5nine.com.
NS records for this zone are defined at 5nine.com.
Question and response
Question
dig alt.5nine.com. NS
Answer
The response has no answer records.
Authority
5nine.com. 900 SOA ns-1881.awsdns-43.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0