Blocking multiple ip ranges using mod access in htaccess

Blocking multiple ip ranges using mod access in htaccess

I read the guide from apache site but I'm a bit confused, I'm trying to
ban some ranges using this syntax:
order allow,deny
deny from 127.0.55.0/127.0.75.255
deny from 127.0.235.0/127.0.255.255
allow from all
But I think it's not working properly, probably the syntax is wrong or I'm
using it in the wrong way, where should I write this text in htaccess?
before the other lines or after? in the same htaccess file there're some
mod rewrite script too (for anti-hotlinking).