smtpin.zoho.com has no NS records.
NS records for this zone are defined at zoho.com.
NS records for this zone are defined at zoho.com.
Question and response
Question
dig smtpin.zoho.com. NS
Answer
The response has no answer records.
Authority
zoho.com. 300 SOA ns1.zohocorp.com. dnsadmin.vtitan.com. 2026031200 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0