Not sure how different things are in other parts of the world, but here in Australia all of our debit cards are on the regular Visa/Mastercard networks; you can

Not sure how different things are in other parts of the world, but here in Australia all of our debit cards are on the regular Visa/Mastercard networks; you can use them wherever you can use a credit card online. It's just the transaction is likely to decline if you don't have a balance in your account.