How Do I Reverse Lookup A DNS Record?

In computer networks, a reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual “forward” DNS lookup of an IP address from a domain name.

How do I reverse DNS?

Create a PTR record within your reverse DNS domain.

  • Step 1: Request Zone from ISP. First, you need to obtain the IP address of your mail server.
  • Step 2: Request Reverse DNS Delegation.
  • Step 3: Create Reverse DNS Domain.
  • Step 4: Create PTR Record.

What is DNS reverse lookup zone?

Reverse lookup zones are used to resolve IP addresses to a hostname. For reverse lookup zones to work they use a PTR record that provides the mapping of the IP address in the zone to the hostname.

Do you need reverse lookup zone DNS?

You need reverse DNS to match IP Addresses to Host Names. You don’t need to set up another DNS server for reverse lookup, your existing DNS server should be configured to do it – i.e. if it doesn’t exist, create a Reverse Lookup Zone.

What is my PTR record?

PTR records are used for the Reverse DNS (Domain Name System) lookup. Using the IP address you can get the associated domain/hostname. An A record should exist for every PTR record. The usage of a reverse DNS setup for a mail server is a good solution.

Why is reverse DNS lookup important?

Reverse DNS is also different from forward DNS in who points the zone (domain name) to your DNS server. However reverse DNS is important for one particular application. Many e-mail servers on the Internet are configured to reject incoming e-mails from any IP address which does not have reverse DNS.

How do I find a DNS name from an IP address?

Click the Windows Start button, then “All Programs” and “Accessories.” Right-click on “Command Prompt” and choose “Run as Administrator.” Type “nslookup %ipaddress%” in the black box that appears on the screen, substituting %ipaddress% with the IP address for which you want to find the hostname.

Where are PTR records stored?

The A record for www is stored within the zone file for wordtothewise.com. PTR records are not stored within your domain zonefile, they are stored in a zonefile usually managed by your service provider or network provider.

How do I reverse DNS lookup in Windows?

Intellect Connect

  1. To test Reverse DNS, we’ll use the command prompt: Click Start -> Run…
  2. Type “cmd” to bring up the command prompt.
  3. For a standard DNS query, type “nslookup www.google.com” in the command prompt (note, any domain name can replace www.google.com).

Do I need a PTR record?

There should be exactly one PTR record per IP address/name pair. Each IP address should have a PTR record. The convention is, that name’s IP address must have a PTR record that resolves back to the name used in the MX record. There should be an A record for every PTR record (but not necessarily vice versa).

What is a reverse IP lookup?

What is a Reverse IP Lookup? The technique known as Reverse IP Lookup is a way to identify hostnames that have DNS (A) records associated with an IP address. A web server can be configured to server multiple virtual hosts from a single IP address. This is a common technique in shared hosting environments.

What is forward DNS lookup?

Forward DNS is a type of DNS request in which a domain name is used to obtain its corresponding IP address. A DNS server is said to resolve a domain name when it returns its IP address. A forward DNS request is the opposite of a reverse DNS lookup.

What does DNS lookup do?

DNS Lookup: How a Domain Name is Translated to an IP Address. At Catchpoint, we believe that fast DNS (Domain Name System) is just as important as fast content. DNS is what translates your familiar domain name (www.google.com) into an IP address your browser can use (173.194.33.174).