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

Results forspf.worksmobile.com

Resolver

Location

TXT

Name	TTL	Value
spf.worksmobile.com	300	v=spf1 ip4:125.209.208.0/20 ip4:125.209.224.0/19 ip4:203.104.170.0/23 ip4:211.249.44.192/26 ip4:211.249.45.192/26 ip4:110.234.248.0/21 ip4:211.188.76.0/24 ip4:114.111.35.0/24 ip4:61.247.196.0/24 ~all