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

Results for_spf-e.trendmicro.co.jp

Resolver

Location

TXT

Name	TTL	Value
_spf-e.trendmicro.co.jp	300	v=spf1 ip4:66.180.80.0/20 ip4:216.99.128.0/20 ip4:216.104.0.0/19 ip4:150.70.0.0/16 ip4:133.217.192.19 ip4:133.217.192.20 ip4:133.217.192.21 ip4:133.217.192.22 ip4:210.175.0.30 ip4:210.168.110.130 ip4:113.39.92.0/24 ip4:210.189.85.128/25 ip4:210.146.19.7 ip4:210.146.19.8 ip4:202.3.185.208/28 ip4:211.127.182.195 ip4:211.127.182.200 ip4:153.125.222.18 -all