Per PCI DSS Requirements and Security Assessment Procedure, Section 6.4.3, 'Production data (live PANs) are not used for testing or development.
Never use these account numbers in the live, production environment. These account numbers are extracted from the Certification tests of Chapter 2 and the transaction examples of Chapter 3. The following table provides a list of credit card numbers you can use in our Certification environment to construct your own transactions beyond what is required for certification. A payment card number, primary account number (PAN), or simply a card number, is the card identifier found on payment cards, such as credit cards and debit.