I know that many constituent colleges at the University of Cambridge are the only address in their post code. For example, Trinity College is CB2 1TQ.
However, hundreds of people live in each college (they just have large mailrooms), so on a practical level you’d likely need to put your name down if you wanted to get mail.
However, hundreds of people live in each college (they just have large mailrooms), so on a practical level you’d likely need to put your name down if you wanted to get mail.