Does anyone know what the Spark Line Number is?

I need to update the coder so I can use free wifi.

This is Spark's instruction:

If you have a Naked broadband plan, this is the line number which can be found on your bill alongside your broadband plan (starting with "08" for most customers, or "016" if you have Fibre Broadband, or "027" if you have Wireless Broadband). 

I have my account and can't find the line number.

Where (or what) is it?