The coordinates 63°N and 150°W correspond to a location in the Bering Sea, specifically a point in the northwestern part of the Aleutian Islands.

There is no major city at these coordinates. The closest inhabited area would be Dutch Harbor (at roughly 53°N 166°W), which is the largest city in the Aleutian Islands. However, it's important to note that the Aleutian Islands are sparsely populated, with most of the landmass being uninhabited.