I searched for Bank Nifty code in ICICI and could not find it initially and found it after some searching.

The Stock code for Bank Nifty in ICICI is CNXBAN

You can use the below link to checkout its quote

ICICI direct.com :: Trading :: Latest Quote

Bank Nifty is a pretty useful index for Futures and Options traders.

Watch the Below Video for Intra-Day Options Strategy on Bank Nifty