_spf_gp.orange.fr has no NS records.
NS records for this zone are defined at orange.fr.
NS records for this zone are defined at orange.fr.
Question and response
Question
dig _spf_gp.orange.fr. NS
Answer
The response has no answer records.
Authority
orange.fr. 900 SOA ns2.orange.fr. hostmaster.orange.fr. 6073 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0