PTR record

PTR record | PTR record of IP address | DNSBL check


PTR record is commonly needed for the mail servers. Every mail server has own DNS A record, that points to an ip address, but not all ip addresses have reverse PTR record. If you do not have PTR records, probably your mail will be rejected from other mail servers. Usually you can't create a PTR record yourself, because you are not a owner of ip addresses, just domain names. But you can ask your service provider to create PTR records, or delegate this possibility to you.

The best way is to make a reverse DNS PTR record same as DNS host A record for your mail server. Please scroll down this page to see some examples how to check DNS PTR record manually.

You can check PTR record using this page. Your mail servers will be automatically detected. This tool will not check PTR record of individual IP address. To do it, please use this page.

PTR record check:

MX records of

PTR records


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Whois record domain

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% Copyright (c)
%  The use of the data below is only permitted as described in
%  full by the terms of use at ,
%  being prohibited its distribution, commercialization or
%  reproduction, in particular, to use it for advertising or
%  any similar purpose.
%  2018-11-14T04:40:43-02:00
aut-num:     AS4230
abuse-c:     GSE6
owner:       Associação Rede Nacional de Ensino e Pesquisa
ownerid:     03.508.097/0001-36
responsible: Nelson Simões Silva
country:     BR
owner-c:     RCO217
tech-c:      RCO217
created:     20141022
changed:     20141022
nic-hdl-br:  RCO217
person:      RNP - Centro de Engenharia e Operações
country:     BR
created:     20060406
changed:     20160801
nic-hdl-br:  GSE6
person:      Grupo de Segurança Internet da Embratel
country:     BR
created:     20001005
changed:     20160720
% Security and mail abuse issues should also be addressed to
%, , respectivelly to
% and
% accepts only direct match queries. Types
% of queries are: domain (.br), registrant (tax ID), ticket,
% provider, contact handle (ID), CIDR block, IP and ASN.


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