All the banks have outsourced their back office operations to those cheap ah nehs. The only exception are probably those German, Swiss or Japanese banks, but those are commercial banks.
I still have a POSB account for simple transactions. I had got it long before it was acquired by DBS (and when a 1-year fixed deposit yielded 5% return). The bank account number is very beautiful, so I won't give it up.
Number like 74747474 or 89898989?