My Reverse Look Up suddenly stopped working for most servers

[Reindl Harald]

don't reply off-list on mailing-lists!

Am 08.02.2017 um 17:37 schrieb Majid Chavoshi:
> Hey reindl,
>
> Thanks so much for your reply. How would I find out if I own it or not?
> Sorry, but I'm kind of new at this; thanks.

if you would have told the nameserver and sample ip's everybody already 
could take a look, but you didn't provide *any* informations in two 
mails but aksing for help - help us to help you

you should know such basics about your enviroment!

how many ip-adresses do you have?
ISP's typically don#t delegate (if at all) if you don't have at least a 
/24 for your own

> On Wed, Feb 8, 2017 at 10:32 AM, Reindl Harald <h.reindl at thelounge.net
> <mailto:h.reindl at thelounge.net>> wrote:
>
>
>
>     Am 08.02.2017 um 17:26 schrieb Majid Chavoshi:
>
>         My DNS was working find, but the reverse look up suddenly stopped
>         working for most servers (it still works for a few servers, I'd
>         say it
>         still works for 20% of servers). Where can I look? What to
>         restart? What
>         should I do? Thanks
>
>
>     you don't provide much informations
>
>     are you sure *your* server is responsible for the PTR zone at all?
>     for most people it is not because it belongs to the ISP