ns1.siteground.com has no NS records.
NS records for this zone are defined at siteground.com.
NS records for this zone are defined at siteground.com.
Question and response
Question
dig ns1.siteground.com. NS
Answer
The response has no answer records.
Authority
siteground.com. 360 SOA ns-cloud-a1.googledomains.com. sysadmin.siteground.com. 2012102024 60 60 360 360
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0