spf.viaduc.fr has no NS records.
NS records for this zone are defined at viaduc.fr.
NS records for this zone are defined at viaduc.fr.
Question and response
Question
dig spf.viaduc.fr. NS
Answer
The response has no answer records.
Authority
viaduc.fr. 300 SOA ns1.nom-domaine.fr. info.viaduc.fr. 2026022701 10800 3600 604800 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0