What symbol is called 'hash' in US English? [closed]

Wikipedia:

The symbol # is most commonly known as the number sign,[1] hash,[2] or pound sign.[3]

If I give my address as: 436 Main Street # 201, that is read "number".

If I add to my Facebook post #MeToo, that is a "hash tag"

If I write 5# of potatoes, I read it "5 pounds".

All of these are used in the US.

For £, I would probably say "Pounds Sterling" or "British Pounds" or something.

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Request in a comment for reference on # for pounds ...
It seems to have been used only in America. Nowadays it is mostly gone, except occasionally for hand-written signs.

Lots of historical examples are found HERE

For example, this one dates from 1850.

At the top, 7-1/4 pounds of nails; at the bottom, 6 pounds of nails.