What is “reverse DNS” and do I need a Lookup API?

the concept behind reverse dns

The importance of the reverse DNS Lookup API becomes easy to understand once we define a few concepts. Let’s start with the most basic concept, how the websites we know by name came about and are used today.

DNS versus rDNS

The Domain Name System (DNS) is often compared to a phone book for the Internet. The domain names we know and use every day are translated by the DNS into IP addresses. Before the DNS, the long string of numbers that make up an IP address needed to be entered (and remembered) by human users.

The reverse DNS (rDNS) is just what the name implies. It reverses the naming process, that is, it receives an IP address and outputs the corresponding domain name that we recognize as the name of our www.website.com, .net, .etc. One of the most significant applications of rDNS is to protect against spam. It automatically blocks messages with domain names that do not correspond to their IP address of record.

The Role of APIs

apis and their important role for access to rdns

Application Programming Interfaces (API) is used by large companies and their customers. Most people are unaware of just how important APIs are to their daily lives. APIs offer quick access to rDNS . Visiting a web page requires interacting with a remote server. An API is the part of the server that receives and sends information.

From a developer’s perspective, APIs enable a browser to send requests directly and also bypass server functions. This capability enables visitors to complete actions while remaining on your website. Most websites now use third-party APIs. They are an integral part of web development. APIs assist development teams working on multiple servers. This is actually a big industry since a lot of web problems are solved by creating distributable library or service solutions founded on API technology.

How is Lookup API Different?

Now that we established how essential APIs are to the underpinnings of the web, let’s consider web traffic. Much of the thought going into how APIs function is by developers who regularly interact with these interfaces. As we have already established, an API affects everyday users. When a popular website invariably attracts a high amount of traffic, issues of lag can be attributed directly to an API. The Lookup API is optimized for speed and volume. It provides a quickly accessible ownership record of domain names and IP addresses, along with registration details. So if your website is overloaded with requests, or if you need a long list of domains, the reverse DNS Lookup API may solve your problems, or at least offer some relief.

Configuring E-mail Servers

e-mail server configuration

The DNS is important for e-mail servers. They can be configured to detect IP addresses without reverse DNS and then reject their incoming emails. For hosting your own email server, all that you need to set up is the rDNS record pointed to your primary domain.

Amazingly, it does’t take much to tweak the Internet nowadays.