qq-b.mail.qq.com NS records

NS Authoritative DNS server
3m
qq-b.mail.qq.com has no NS records.
NS records for this zone are defined at mail.qq.com.
trace qq-b.mail.qq.com NS records for mail.qq.com

Question and response

Question

dig qq-b.mail.qq.com. NS

Answer

The response has no answer records.

Authority

mail.qq.com. 180 SOA qq.com. webmaster.qq.com. 1768972738 300 600 86400 180

Additional

. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0