Does the MLS have information about off-market properties?

[Jose A Serrato]

Hello BP Community newbie here👋🏽, as stated in the title, can agents for example type in any address that is off-market & find that current owner's information like phone number, email, last sold price, etc..?

[Russell Brazil]

Most MLS systems interact with the local tax records. So names are available, but nothing else. (Not all MLS systems)