unlisted

Short definition from Wiktionary

Adjective

1. 1
   Not included in a list: Not listed in the telephone directory.
2. 2
   Not included in a list: Not traded on the stock exchange; not being a listed company.
3. 3
   Not included in a list: Not officially protected from demolition or alteration.

Verb

1. 1
   simple past and past participle of unlist