what does windbg command "d esp" exactly do?

I know that windbg command "d esp" display the cont开发者_开发技巧ent that esp points. But, what range of it? How does it get the end?

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The d command displays memory. If you don't enter a range the default is 128 bytes. Most of the d commands use a default of 128 bytes, but e.g. the df uses 64 bytes.

So d esp essentially means display 128 bytes of memory starting from the address held in esp.