support.silverstreet.com has no NS records.
NS records for this zone are defined at silverstreet.com.
NS records for this zone are defined at silverstreet.com.
Question and response
Question
dig support.silverstreet.com. NS
Answer
The response has no answer records.
Authority
silverstreet.com. 180 SOA ns20.digicertdns.com. dns.digicertdns.com. 2009011579 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0