The hyphen character and the alikes

keyboard minus sign or the Hyphen-Minus character: -

BaseForm[#,16]&/@ToCharacterCode["-"]

Wolfram Language hyphen (\[Hyphen]): -

ToString["\[Hyphen]",InputForm,CharacterEncoding->"ASCII"]

BaseForm[#,16]&/@ToCharacterCode["\[Hyphen]"]

en-dash: –

BaseForm[#,16]&/@ToCharacterCode["–"]

em-dash: –

BaseForm[#,16]&/@ToCharacterCode["—"]