core + attic (Attic Area): these terms have been either deprecated from the core or extentions, or removed from pending as not accepted into the full vocabulary.

postOfficeBoxNumber

Canonical URL: http://schema.org/postOfficeBoxNumber

Thing > Property > postOfficeBoxNumber

The post office box number for PO box addresses.

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
Text
Used on these types
PostalAddress

Schema Version 3.4