The reference assigned to a company in Dun and Bradstreet's Company Register.

References:
The e-GIF version approved for use in NHS England is:
Government Data Standards Catalogue: (GDSC), Version 2.1, Agreed 3 December 2009.
Further information can be found on the Cabinet Office website.

This attribute is also known by these names:

Context	Alias
plural	DUN'S NUMBERS