It can be anything! An apex, subdomain, or even a URL.

Results for_spf-mon.quickpacket.com

Resolver

Location

TXT

Name	TTL	Value
_spf-mon.quickpacket.com	86400	v=spf1 ip4:64.187.232.11 ip4:64.187.224.12 ip4:162.223.29.75 ip6:2605:a880:0:3::c ip6:2605:a880:8000:1::2a ip6:2607:3f00:11:10::75 -all