I've seen these talks from CCC few years ago, tried that myself (on myself) and SS7 only gave MSC id, which is wayy more coarse than cell tower level -- like, 1

I've seen these talks from CCC few years ago, tried that myself (on myself) and SS7 only gave MSC id, which is wayy more coarse than cell tower level -- like, 1M customers per MSC (still a privacy concern of course). But that city block level location thing seems like it is something more sophisticated.