Many customers have asked which market data subscriptions they need for trading US stocks. It's not 100% clear and the stock feeds are quite different from Futures. After all, Futures all trade on a single exchange and any individual stock trades on many of them. NASDAQ is not a single exchange but a collection of exchanges. NYSE is an exchange but their stocks also trade on NASDAQ.
Interactive Brokers aren't that good at answering this question.
Your goal of course, is to see as much depth as possible across all of these markets, without seeing duplicates. Without a firm answer from IB themselves, all we can do at Jigsaw is tell you what we subscribe to. This is listed below:
We will of course provide an update but this does appear to get a full picture of the depth. Note that Jigsaw daytradr consolidates depth from these different subscriptions, so that you see the full picture from the tools.