North American Network Operators Group
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Re: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS

  • From: Stephen Griffin
  • Date: Tue May 15 18:19:56 2001 
In the referenced message, Hunter Pine said:
> 
> Larger - ARIN refers to netblocks by subnet mask bit length. So a /30 is
> larger than a /29.
> 
> It took me a while to figure this out myself while reading their docs. I
> guess whenever referring to ARIN, I use the backwards method when comparing
> netblocks to keep myself at least partially sane. :)

I have most commonly seen networks referred to in terms of size
(larger/smaller), and prefixes in terms of length (longer/shorter).

Therefore, a larger network has a shorter prefix-length, and a smaller
network has a longer prefix-length.

IIRC, ARIN makes all references as to prefix-length in this manner.