Question about Reverse mapping name servers

Jeremy C. Reed reed at
Wed Oct 3 22:31:11 UTC 2007

On Wed, 3 Oct 2007, Reedy, Sean wrote:

> Can a DNS servers provide reverse-mapping ( for a block of
> IP addresses if those DNS server don't have an IP address in that block?

Sure. I have done that.

> I'm asking because ARIN requires two name servers whenever you receive a
> block of addresses from them.
> How do you delegate reverse lookup to other name servers from the name
> servers you informed ARIN of?

NS record.

Search for RFC 2317. It has some different ideas too using CNAME.

See for 
several examples. (Not advocating that service, but google found that 

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