login.publicaster.com has no NS records.
NS records for this zone are defined at publicaster.com.
NS records for this zone are defined at publicaster.com.
Question and response
Question
dig login.publicaster.com. NS
Answer
The response has no answer records.
Authority
publicaster.com. 900 SOA ns-389.awsdns-48.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0