o16.recurly.sproutsocial.com has no NS records.
NS records for this zone are defined at sproutsocial.com.
NS records for this zone are defined at sproutsocial.com.
Question and response
Question
dig o16.recurly.sproutsocial.com. NS
Answer
The response has no answer records.
Authority
sproutsocial.com. 600 SOA ns-1475.awsdns-56.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0