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

Results forspf.service.netease.com

Resolver

Location

TXT

Name	TTL	Value
spf.service.netease.com	300	v=spf1 ip4:220.181.12.0/22 ip4:220.181.31.0/24 ip4:123.125.50.0/24 ip4:220.181.72.0/24 ip4:35.187.193.54/32 ip4:106.2.67.69/32 ip4:42.186.20.78/32 ip4:123.58.175.130/32 ip4:183.61.113.11/32 ip4:1.95.25.210/32 -all