html - Mobile version of website with ip address as url -

is possible have 2 website variants, 1 standard desktops, , 1 mobile when url external web address? example normal address http://xx.xx.xx.xxx:xxxxx/page.html , mobile variant like: http://m.xx.xx.xx.xxx:xxxxx/page.html possible or need use m.example.com style address? , more importantly, if possible how achieved using apache 2 on linux?

you don't need use m. sub-domain. use css @media query

example