Here are few links to convert Unicode characters to code point/Uri percent encoding/decimal NCR etc.
905 represent hex अ in Hindi:
Get full details of each character at this FileFormat.info site. This link will shows Unicode character "अ" detail.
Convert any char to code point/numeric value:
Need to use any char which is not a supported language in your HTML document or you do not have the language installed then you can use this tool for conversion to HTML entities etc.
Update: Few more links:
Tool to Convert Character To Html Entities
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