spf1.bmwgroup.com has no NS records.
NS records for this zone are defined at bmwgroup.com.
NS records for this zone are defined at bmwgroup.com.
Question and response
Question
dig spf1.bmwgroup.com. NS
Answer
The response has no answer records.
Authority
bmwgroup.com. 900 SOA ns.bmw.de. domadm.bmw.de. 2011128900 10800 3600 2592000 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0