spf.vanoppen.com has no NS records.
NS records for this zone are defined at vanoppen.com.
NS records for this zone are defined at vanoppen.com.
Question and response
Question
dig spf.vanoppen.com. NS
Answer
The response has no answer records.
Authority
vanoppen.com. 3600 SOA ns-west.vanoppen.com. hostmaster.vanoppen.com. 2026010301 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0