We did this with APNIC (being based in Australia), and we were able to justify a /24 on a single server without multi-homing. I don't think they allocate less t

We did this with APNIC (being based in Australia), and we were able to justify a /24 on a single server without multi-homing. I don't think they allocate less then a /24 so if you have cause for 1 you get the whole /24. That said ARIN and others might be different. For example APNIC will only allow up to a final /22 allocation at the moment, where as ARIN just allocated a much larger block despite being on final allocation rationing.