DNS Lookup

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Check DNS Propagation Globally


Canoga Park CA, United States (Sprint)
Los Angeles CA, United States (Speakeasy)
Providence RI, United States (Verizon)
Atlanta GA, United States (Bellsouth)
Reston VA, United States (Sprint)
Calgary AB, Canada (Telus)
Sao Paulo, Brazil (Universo Online)
London, United Kingdom (Verizon)
Paris, France (SFR)
Merzig Saarland, Germany (Probe Networks)
Milan, Italy (BT Italy)
Ankara, Turkey (TTNET)
St. Petersburg, Russia (Uni of Tech & Design)
Karachi, Pakistan (Supernet)
Mumbai, India (Tata Indicom)
Bangkok, Thailand (TOT)
Kuala Lumpur, Malaysia (NTT MSC)
Beijing, China (CERNET)
Sydney NSW, Australia (Telstra)
Melbourne VIC, Australia (Telstra)
Auckland, New Zealand (Datacom)


DNS or domain name systems are the key to translate domain names into IP addresses. An IP address is a series of numbers and is therefore difficult to remember. Domain name systems are every user’s helpful tool to make these series of numbers readable and easily recalled through domain names.

Because the internet is based on IP addresses, it is not possible to do without it. However, these series of users may look to be almost indistinguishable in the eyes of its users. It is rather inconvenient to access or find a website when one has to memorize a series of numbers.

The DNS acts as a translator to make websites which are identified by machines through a series of numbers or IP address humanly recognizable through domain names.

Other than domain names, DNS can also reveal other important information such as mail services.

The DNS is a network on its own. When a particular DNS server cannot translate or identify a domain name, it asks other DNS systems until one can translate it into the correct IP address. Because of the nature that DNS works, it has been dubbed as the global network of servers.

One of the many advantages of this system is that there is no organization accountable for updating or running it. This system has what is called distributed database.

Why is DNS Lookup Important?

DNS acts as a phone book for the internet. Because the Internet Protocol or IP is the address of a computer in the World Wide Web, the DNS is the phone book that can be utilized by users to find the name associated to it. The DNS can do the same for the internet.

When a user visits a particular website online, the computer or device used then utilizes the DNS to retrieve this site’s IP address. Without DNS, users can only access a website if they enter the correct and complete series of numbers or IP associated to it.

DNS caching is the process used in mapping out the operations of a DNS. There are certain threats involved to this such as lack of authenticity or integrity of the information held within the DNS. It is for this reason and more that the Internet Engineering Task Force or IETF came up with the DNS security extensions. Its chief objective is to ensure the authentication of DNS all over the world.

How DNS is affected by Domain Name Servers and Hostname Information

Whenever a web owner changes their hostname or domain name server, the DNS also needs to be registered into the new servers across the globe. This is randomly chosen and the process can take about fifteen minutes to seventy-two hours.

How does a DNS lookup figure in to this?

DNS checking tools can be used to track and monitor the progress of propagation in this process. There are issues that need to be considered and a DNS checking tool will help web owners keep an eye on their information. The issues that may arise come from a host of sources, from the domain name hosts to the website hosts.


Frequently Asked Questions:

What is DNS?

DNS is an abbreviation for Domain Name Server. In a nutshell, a DNS refers to the server wherein the website address can be located at. A DNS needs to be kept private and avoided to be shared with other users.

What is a DNS Transfer?

A DNS Transfer can also sometimes be referred to as a name server transfer. This is the name of the process when a web master changes their domain name servers to another server. For example, the web owner decided to go for another web host. This process normally entails exchanging the current DNS or server to the new host.

How Long Does it Take to Change DNS?

Changing one’s DNS is fast and easy, thanks to the many websites or companies which exists for this sole purpose. However, it is the actual transfer process that may take time. Changing a DNS can be liked to moving from one house to another. In other cases, it takes several hours, while in some, it may take a few days. Some issues or problems contribute to the duration of the DNS transfer time.

Where do DNS Addresses Come From?

A web host is the one which provides the DNS address. Web hosts send the owners an email indicating the DNS address of their site along with other necessary site details. The email would also normally contain instructions on how to change the DNS as well as steps on finding out what the new DNS server of the domain is.

How Does One Change the DNS Server?

Changing DNS requires the user to log into their registrar to retrieve their information and procedure from there. The process of DNS changing may vary for every registrar. Another factor that can affect this is the fact that buttons online constantly change their names and move around.

The user needs to look for their domain manager first to retrieve the different domain names in their possession. Clicking on one domain enables the user to check on the DNS settings or the name of the DNS server itself. By clicking on it, the user can then change the name or key in the new DNS address. After doing so, the user will need to wait a few days for the process to complete.

These are the questions that frequently arise regarding DNS.

However, one issue concerning DNS that is popular right now is Google’s public DNS server.

What exactly is Google DNS and what can it do for you?

Google DNS is a globally free resolution service that anyone can use as substitute to their existing domain name system.

Here are the top three things that Google’s public DNS service promises to do:

  1. Improve user security


It is common knowledge that DNS is vulnerable to attacks such as spoofing and DoS or denial of service attacks. These are prevented by Google’s public DNS through various strategies such as securing one’s data against buffer overflows, implementation of stricter validity checks, addition of entropy to request messages, removal of duplicate queries, and limiting the rate of requests.


  1. Increase Browsing Speed

There are two things which contribute to the latency of DNS: a.) latency between the DNS resolving server and the user and b.) Latency between the existing resolving server and other name servers. Any cause of latency in DNS is prevented by Google through load balancing of shared cache, providing coverage globally, and adequate provision of servers.

  1. Get Accurate Results and Avoid Redirection


Google provides extensive support for the results that web masters expect from their DNS.


Why is DNS Lookup Important?

The importance of DNS lookup expands as networks, computers, and online activities get more sophisticated. From a mere computer phone book, DNS can now be used to look up the credibility or trustworthiness of an email source through the Sender Policy Framework (SPF) provided by the DNS.

Users can use the DNS Lookup tool to help them generate a report about the logs or records that can be provided by the DNS.



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