spf.emma.sparkasse.de has no NS records.
NS records for this zone are defined at sparkasse.de.
NS records for this zone are defined at sparkasse.de.
Question and response
Question
dig spf.emma.sparkasse.de. NS
Answer
The response has no answer records.
Authority
sparkasse.de. 300 SOA ns1.s-fg-net.de. domreg.f-i.de. 227313 10800 1080 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0