sms.airtel.in has no NS records.
NS records for this zone are defined at airtel.in.
NS records for this zone are defined at airtel.in.
Question and response
Question
dig sms.airtel.in. NS
Answer
The response has no answer records.
Authority
airtel.in. 900 SOA aaadel.mantraonline.com. root.dnsdel.mantraonline.com. 3341 10800 3600 2419200 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0