When you contact BASE, we ask for your customer number and/or account number. That way, we can quickly find your details in our customer base and we can help you immediately. You can find your customer and account number in My BASE or on your bill.
You need your customer number when you...
We use your account number to create your bills or invoices with the correct information.
Good to know: usually you only have one account number, but you can have several. For example, do you have a separate account for your partner's or child's mobile phone subscription? Then we will use a different account number. This is very convenient because this way you and we can easily distinguish the bills.
