cptel.smarthub.coop has no NS records.
NS records for this zone are defined at smarthub.coop.
NS records for this zone are defined at smarthub.coop.
Question and response
Question
dig cptel.smarthub.coop. NS
Answer
The response has no answer records.
Authority
smarthub.coop. 900 SOA ns-179.awsdns-22.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0