ns.supporthost.com has no NS records.
NS records for this zone are defined at supporthost.com.
NS records for this zone are defined at supporthost.com.
Question and response
Question
dig ns.supporthost.com. NS
Answer
The response has no answer records.
Authority
supporthost.com. 1800 SOA glen.ns.cloudflare.com. dns.cloudflare.com. 2398699642 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0