If you got an old set top box 2 is NBC either KSHB41 for older boxes n KNPN21 FOR NEWER BOXES as its never been changed from Channel 2 ever since it was on channel 8 decade ago. So you might want to rescan your box or go into settings n make sure its checked so you can still get it.
No it is still channel 2 you are have some type of issue whether it is signal or your box not sure
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