Americas.US.6307.IP3.regusnet.com has no NS records.
NS records for this zone are defined at regusnet.com.
NS records for this zone are defined at regusnet.com.
Question and response
Question
dig Americas.US.6307.IP3.regusnet.com. NS
Answer
The response has no answer records.
Authority
regusnet.com. 300 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2019168882 62224 31112 435568 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0