Whois 172/12

Leigh Porter leigh.porter at ukbroadband.com
Sun Jan 15 08:17:20 UTC 2012

On 15 Jan 2012, at 07:39, "Ted Fischer" <ted at fred.net> wrote:

> Hi all,
>   Tearing what's left of my hair out.
>   A customer is getting scanned by a host claiming to be "".
>   I know this is bogus, but I want to go back to the customer with as
> much authoritative umph as I can (heaven forbid they just take my
> word).
>   I'm pretty sure I read somewhere once that 172/12 was "reserved" or
> something like that.  All I can find now is that 172/8 is "administered by
> ARIN".  Lots of information on 172.16/12, but not a peep about
> 172/12.
>   If anybody could provide some insight as to the
> allocation/non-allocation of this block, it would be much appreciated.
>   Thanks.
> Ted Fischer

I would look for the prefix in your BGP table and in a couple of looking glasses and show the empty output.

If its not there, then it is bogus.


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