IPv4 smaller than /24 leasing?

Hi, I have stumbled upon this site [1] which seems to offer /27 IPv4 leasing. They also claim "All of our IPv4 address space can be used on any network in any location." I thought that the smallest prefix size one could get routed globally is /24? So how does this work? [1] http://www.forked.net/ip-address-leasing/ Thanks -- Filip Hruska Linux System Administrator