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Vendor or Customer?

VCSS is a voluntary participation program; however any vendor desiring to participate must have a valid DUNS/DUNS+4 number and must register in the Central Contractor Registration (CCR) database prior to registering in VCSS. Vendors can contact Dun & Bradstreet at to obtain a DUNS/DUNS+4 number. The vendor must ensure that their CCR registration remains active at all times.

VCSS provides web access to the transactions of the GSA’s customers. The data can be viewed by the representatives of the customer organization and also by the activity that processes their IPAC transactions. Customers must register their GSA-issued Account Codes (formerly known as BOAC or AGBU Codes). IPAC activities must register their ALC codes.