I would say that IL and MA at least do have gun registration, but I don't know about NJ and NY out of NYC which does have gun registration and in fact used the registration lists for confiscation in the Dinkins years.
NYC has been a gungrabbing fiefdom since the Sullivan Act of 1913. Got that.
But as far as I know, the noncompliance rate for registering “assault weapons” in NY, CA, MA, CT, IL & even NJ, is running at 85 to 90 percent. And the po-po haven’t started knocking on doors yet. Too dangerous, maybe?
But watch out for GVRO/Red Flag laws, I’ll say it till I’m blue in the face, these laws are an all out attack on the Bill of Rights, not just the Second.
ALL the upstate New York guns are duly registered in Maine. There are no guns in upstate NY.
Technically, IL has gun ^owner^ registration.