IPv4 smaller than /24 leasing?

[Filip Hruska <fhr () fhrnet eu>]

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