ASN Domain for rDNS

Kate Gerry kate at
Wed Dec 10 05:13:27 UTC 2014

Short answer: I just like doing it.

Long answer: It allows me to create as many hosts on a segregated domain instead of making my company DNS zone 3000 records long.

-----Original Message-----
From: NANOG [mailto:nanog-bounces at] On Behalf Of Fred
Sent: Tuesday, December 09, 2014 4:36 PM
To: nanog at
Subject: Re: ASN Domain for rDNS

I'd say this is mostly for whitelabelling reason rather than a technical one?

Keefe John:
> I've been seeing more and more carriers(and even small ISPs) using 
> as their domain for rDNS on IP space.  What are the pros 
> and cons for doing this versus using your primary business domain name?
> Keefe John

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