DUNS numbers do not expire. According to Dun and Bradstreet, the only company to issue DUNS numbers: “Once assigned it will not be re-issued or re-assigned.

How long is a DUNS number valid?

DUNS numbers do not expire. In fact, your unique number will remain with your company even if you go out of business.

Do I have to renew my DUNS number?

Again, HUD requires an active DUNS number in order to renew contracts covered by the notice, and the DUNS number needs to be renewed each year to stay active.