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

Results forspf.ocn.ad.jp

Resolver

Location

TXT

Name	TTL	Value
spf.ocn.ad.jp	300	v=spf1 ip4:61.118.10.64/27 ip4:61.118.10.144/28 ip4:210.163.50.146 ip4:203.139.161.226 ip4:203.139.161.227 ip4:122.28.19.73 ip4:122.28.19.74 ip4:210.161.154.14 ip4:210.161.154.22 ip4:60.37.20.20 ip4:60.37.20.21 ip4:122.28.0.6 ip4:122.28.0.7 ip4:203.139.163.77 ip4:203.139.163.78 ~all