2625745.spf05.hubspotemail.net has no NS records.
NS records for this zone are defined at spf05.hubspotemail.net.
NS records for this zone are defined at spf05.hubspotemail.net.
Question and response
Question
dig 2625745.spf05.hubspotemail.net. NS
Answer
The response has no answer records.
Authority
spf05.hubspotemail.net. 180 SOA ns10.digicertdns.com. dns.digicertdns.com. 2009010105 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0