Channel 549.
Yes. NBCSN is channel 603 on DirecTV.
Channel502
100
408
265
Channel 603
On Optimum, NBCSN is typically on channel 214. However, channel numbers may vary depending on your specific location and cable package. It's recommended to check your Optimum channel lineup or contact Optimum customer service for the most up-to-date information.
327
259
4
146