spf.gansend.com has no NS records.
NS records for this zone are defined at gansend.com.
NS records for this zone are defined at gansend.com.
Question and response
Question
dig spf.gansend.com. NS
Answer
The response has no answer records.
Authority
gansend.com. 3600 SOA ns1.mainloop.net. hostmaster.gansend.com. 2025080606 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0