Multiple PTR records for one IP?

[D. Stussy]

"Peter Laws" <plaws at ou.edu> wrote in message
news:g6ksj9$30no$1 at sf1.isc.org...
> Broken or just a bad idea?
> It works, I see, but that doesn't mean it's not broken.

Not broken - as long as the list of reverses is small (i.e. fits into a
single 512-byte UDP response packet).

Software that can't handle more than one PTR on a reverse lookup is broken.
There is some broken software out there.

However, note that depending on the usage, any through all of those PTRs may
have their corresponding forward lookups shortly occur after, so keep DNS
server load issues in mind.