spf.mail.qq.com NS records

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

Question and response

Question

dig spf.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