ucc1.airtel.com has no NS records.
NS records for this zone are defined at airtel.com.
NS records for this zone are defined at airtel.com.
Question and response
Question
dig ucc1.airtel.com. NS
Answer
The response has no answer records.
Authority
airtel.com. 86400 SOA dnsdel.mantraonline.com. root.dnsdel.mantraonline.com. 2014073124 7200 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0