worldwhy.musimob.com has no NS records.
NS records for this zone are defined at musimob.com.
NS records for this zone are defined at musimob.com.
Question and response
Question
dig worldwhy.musimob.com. NS
Answer
The response has no answer records.
Authority
musimob.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1770131875 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0