Hi Deepthi,
you can use web service QueryCodelistIn. It doesn't give you all details, but the code and the description. In the blog post below I described some examples using this web service:
How to get ByDesign Code Lists via Web Service QueryCodeListIn
Sample xml snippet:
<n0:CodeListByIDQuery_sync xmlns:n0="http://sap.com/xi/SAPGlobal20/Global">
<CodeListSelectionByID>
<SelectionByCodeDataType>
<Name>MeasureUnitCode</Name>
<NamespaceURI>http://sap.com/xi/AP/Common/GDT</NamespaceURI>
</SelectionByCodeDataType>
<SelectionByLanguageCode>EN</SelectionByLanguageCode>
</CodeListSelectionByID>
</n0:CodeListByIDQuery_sync>
Regards,
Knut