mail.spf.ecritel.net has no NS records.
NS records for this zone are defined at ecritel.net.
NS records for this zone are defined at ecritel.net.
Question and response
Question
dig mail.spf.ecritel.net. NS
Answer
The response has no answer records.
Authority
ecritel.net. 60 SOA ns-a.ecritel.fr. postmaster.ecritel.fr. 2026030603 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0