m.serendec.co.jp has no NS records.
NS records for this zone are defined at serendec.co.jp.
NS records for this zone are defined at serendec.co.jp.
Question and response
Question
dig mobile.dudamoblie.com. NS
Answer
The response has no answer records.
Authority
dudamoblie.com. 172800 SOA ns1.dnsowl.com. hostmaster.dnsowl.com. 1773291132 7200 1800 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0