If you want to know the IP address of a specific website, one thing that can prove to be helpful would be DNS lookup, such as with what you can find from www.ipdatabase.com/dns-lookup/ – DNS Lookup. With the latter, you simply need to type the URL of the website and in an instant, you will know its IP address, which can be useful in different ways, such as for performing DNS management operations. This kind of lookup is classified as forward DNS lookup, which is differentiated from reverse DNS lookup. Keep on reading the rest of this article as it attempts to explain the differences between the two in the simplest manner that is possible.
Forward DNS Lookup
Under this type of DNS lookup, the user will use an internet domain in order to find the corresponding IP address. Each IP address is unique, which is why there will be new results depending on the website that is entered. When you are searching for a specific website, such as “facebook.com”, once the address is inputted on the browser, it is followed by transmittal to a nearby router, which performs the forward DNS lookup to find the IP address.
The forward DNS lookup is more common as against the reverse DNS lookup, which will be further discussed below. This is basically because of the fact that most people are thinking on the basis of the domain names and not the long string of numbers that comprise the IP address.
Reverse DNS Lookup
In the case of reverse DNS lookup, on the other hand, it is the IP address that you will enter and a search function will reveal the specific domain name of the website where it belongs. It can be used in different applications, such as when it comes to being able to filter spam messages. More often than not, spammers will make use of an IP address that is invalid, which means that there is no equivalent domain name. With the use of reverse DNS lookup, you will input the IP address to the DNS database. Provided that no valid name is found matching the IP address, the message will be blocked, and hence, making it possible for you to avoid being spammed.
Although the reverse DNS lookup can be used for filtering spams, its application does not come without an issue, especially with the instances where it can also block a valid email. Coupled with network delays and improperly configured servers, you might have a problem in receiving emails from senders, even if they are not actually spams. Because of this, it is important to be careful with the use of such as it can have negative implications on the operations of the business. For instance, in the case of AT&T WorldNet, they used reverse lookup with other anti-spam programs to block spam emails. However, it has been stopped only 24 hours after many of their clients have complained that their messages are bouncing back and not received.