xchange.medisolution.com has no NS records.
NS records for this zone are defined at medisolution.com.
NS records for this zone are defined at medisolution.com.
Question and response
Question
dig xchange.medisolution.com. NS
Answer
The response has no answer records.
Authority
medisolution.com. 1800 SOA collins.ns.cloudflare.com. dns.cloudflare.com. 2397047535 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0