spf4.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 spf4.bmwgroup.com. NS
Answer
The response has no answer records.
Authority
bmwgroup.com. 900 SOA ns.bmw.de. domadm.bmw.de. 2011128862 10800 3600 2592000 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0