問"#"的讀法

包括串錯字那位, 其實以上各位都提供了正確的答案. 可能因為地域及所接觸的圈子不同而"側重"某個名稱而已.
有關 # 的種種名稱 (包括中文) 請參考以下網址:
http://en.wikipedia.org/wiki/Number_sign

The correct way of saying the symbol # is pound. In England or US, if you ever get a chance to contact a company, you will be most likely prompted to an automatic answering system. You will always hear recording says 'press pound for more options'.
So, pound is widely used in western culture's phone system.

hash / pound

harsh