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

Results forspf-us.tmes.trendmicro.com

Resolver

Location

TXT

Name	TTL	Value
spf-us.tmes.trendmicro.com	300	v=spf1 ip4:18.208.22.64/26 ip4:18.208.22.128/25 ip4:18.188.9.192/26 ip4:18.188.239.128/26 ip4:18.97.0.160/27 ip4:107.22.223.18 ip4:52.70.252.86 ip4:54.146.4.63 ip4:54.174.82.86 ~all