spf.senselan.ch has no NS records.
NS records for this zone are defined at senselan.ch.
NS records for this zone are defined at senselan.ch.
Question and response
Question
dig spf.senselan.ch. NS
Answer
The response has no answer records.
Authority
senselan.ch. 1800 SOA ns1.senselan.ch. noc.senselan.ch. 1773224785 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0