Can I use these EPP commands with all Registry objects?

No, EPP commands may not be defined for certain objects because of the nature of these objects. The following table summarizes which commands can be used with which objects.

Registry Command Domain Host Contact
EPP Query Commands
Check ok ok ok
Info ok OK OK
Transfer OK undefined OK
EPP Transform Commands
Create OK OK OK
Update OK OK OK
Delete OK OK OK
Renew OK undefined undefined
Transfer OK undefined OK