- what is dns
- check dns
- dns lookup
- what is a dns server
- dns server is not responding
- dns change
- dns propagation
- dns port
- your dns server might be unavailable
- public dns
- best dns
- my dns
To begin with, you may wonder what is dns. DNS stands for Domain Name System and as its name indicates it is a whole system whose main task is to translate IP addresses into domain names that are easier to memorize. IP addresses are part of the protocol, of what dns is, with which computers and today also a huge number of devices connect and communicate through the Internet. So, for example, it would be difficult for you to remember the IP address 22.214.171.124 to write it in your browser, but perhaps it would not be so difficult for you to remember the domain name internic.net, which corresponds to the InterNIC page, which provides public information related to what is dns in terms of public and private organizations that are part of the infrastructure of the domain name system.
Check DNS consists of checking if the DNS assigned to the domain name are active and responding to the DNS verification queries. By verifying or checking dns you can know whether the domain is resolving correctly and therefore being directed to the IP address of the hosting server where the website of said domain is located. There are times when verifying dns you may find incorrect dns records, or that the dns server is not responding, or that the dns propagation is taking place and has not yet completed, or you get a "dns server not available" message, or even that the domain is no longer registered. That is why it is important to check dns and you can do it with this online tool that we offer you for free at VerDNS.
Checking DNS by performing a nslookup is a way to verify the authoritative DNS of a domain and a way to check whether the DNS server or DNS servers assigned to that domain are resolving the DNS queries correctly, that is, revealing the IP address and also various types of records within the domain's DNS zone. When you check dns you will get all this information, but mainly you will know if the dns server is not responding or is not available at the moment. Checking dns (nslookup) is also a quick and easy method to know the dns of a domain and, in most cases, when viewing the dns, also find out who is the hosting provider or the hosting service in which it is hosted the domain. Check dns and View dns is something you can do with the form you find in VerDNS at the top of this web page.
The DNS lookup query consists of first verifying or checking the DNS of a domain by using a lookup or nslookup command, and after knowing the authoritative DNS for that domain, obtaining the records of the DNS zone, such as A record (the IPv4 address of the domain), the AAAA record (the IPv6 address of the domain), the MX record (the domain's mail server), the CNAME record, the TXT record, the PTR record, the SRV record, and other data that may be included in the DNS zone, as well as the SOA, the TTL, etc. When you do the dns lookup query the first thing you will notice is whether or not the dns server is available or if you get an error message or no message at all that may indicate that the dns server is not responding. The dns query can be done with online dns query services such as the one you find in VerDNS, the dns query field or check dns field at the top of this web page.
The DNS server is a fundamental part of the Domain Name System. There are several part and basically it works through a hierarchical structure, with a distributed system and with the classic client-server model. When checking the dns of a domain, the query first goes to the root dns server, which are actually several dns servers distributed and located in various places and are identified by the letters from A to M. Each of these root dns servers operates with physical dns servers located in diverse locations around the world, perfectly synchronized thanks to the Anycast network routing and addressing methodology. The dns server takes care of the dns queries of all domains, starting with the domain extension, from the classic .COM, .NET or .ORG, through the country code extensions such as .US for United States, .UK for United Kingdom, .IE for Ireland, .IN for India, .NZ for New Zealand or .AU for Australia, to the new domain extensions (new gTLD), some as sophisticated as .OLDNAVY or even some with an ecological touch such as .ORGANIC or .ECO.
When doing the dns query (lookup or nslookup) it is possible that the result is that the dns server is not responding. And when the dna server isnt responding then your dns server might be unavailable, it stops resolving the DNS records associated with the domain, including the A record (in the case of IPv4) and the AAAA record (in the case of IPv6) and then the website stops working, since the A and AAAA records are those that indicate the IP address of the web server (the hosting) where the website is hosted at. If the dns server is not responding then it is not possible to do the dns query or check the dns records of the dns zone of the domain. Some possible solutions for when the dns server is not responding are: check that the dns port is open, restart the dns server, verify that the domain name is correct and find out whether the domain is actually registered.
DNS Change: The procedure to change DNS can refer to two situations. One, to change dns in the control panel or admin interface of the domain registrar where the domain was registered. This operation is normally done when you switch from one hosting service provider to another and therefore you need to perform a dns change to indicate the dns of the new web hosting provider. The other situation that changing dns can refer to might be when changes are made to the IP address that points to the physical dns server. In the first case, to change dns at the hosting service provider, you must contact the company (registrar) where the domain was registered. In the second case, the usual situation is that the system administrator who operates the dns server takes care of this procedure.
To check DNS propagation you can use the online DNS query tool (lookup or nslookup) that you will find at the top of this web and thus you will be able to watch and realize the status of the DNS propagation of your domain. DNS propagation consists of performing the dns query (lookup or nslookup) of your domain and watching from the results of such dns query whether the respective DNS records are showing the changes in the dns zone, either due to the change of dns as such or because some records have been modified within the dns zone of the domain. By checking the domain propagation from the dns propagation check or test when it has been completed, the dns propagation tool will reveal that the new dns or new dns records are already active and resolving correctly for the domain name. The global dns propagation is bound to the time to live (TTL) settings in the domain's dns zone. The DNS propagation test or check depends mainly on the update speed of each ISP, that is, each Internet access provider, in each country. For a couple of ccTLD, like the .ES, until a few years ago it used to be very slow and therefore dns records took time to update, because the registry operator used to update their DNS zones only twice a day. But nowadays the updates are almost instantaneous and therefore the propagation of dns in Spain for .ES domains is usually very fast, a matter of seconds or minutes at most.
As for the dns port, the dns server (service) uses the UDP protocol and dns port number 53. If the dns port is not responding or is unavailable, you will not be able to search, check or verify the dns zone and records of your domain.
After a dns query (lookup or nslookup) the result may be: your dns server might be unavailable. It may be because the dns server is temporarily unresponsive or not available. And if the result is dns server not available, then it is not possible to query the dns zone of a domain, nor to check its dns records nor to check the dns status or the dns propagation of such domain.
Some Internet service providers make two or more public DNS available to the public for at least two scenarios: public DNS as dns servers to resolve DNS queries locally and that are configured on a server, in a computer, on a router or even on a mobile phone. Operators that offer public DNS in this way usually include some interesting features, such as faster DNS query resolution, greater security, and sometimes greater privacy. Examples of this type of public DNS are those that offer for example: CloudFlare, with the magnificent IP address 126.96.36.199 (and 188.8.131.52), extremely easy to access and remember. Also Google, with IP addresses that are also easy to remember: 184.108.40.206 and 220.127.116.11. Or the OpenDNS public DNS service, with the IP addresses 18.104.22.168 and 22.214.171.124.
And the other public dns situation may be that of the dns service offered by many providers, some for a fee and others for free. The majority of domain registrars nowadays offer free dns hosting service included with the purchase of the domain. There are also dns hosting operators that charge for this service, such as Amazon's Route 53 service. And there are others that offer this service for free, such as CloudFlare, which, being mainly a CDN service provider, offers the DNS hosting service for free. And also the veteran Hurricane Electric with its free service available at dns.he.net.
Some of the best public dns are offered by the big Internet operators, such as Google and CloudFlare, but there are many more. It is possible that in your country the dns service of your local ISP is still more effective. Trying to list the best dns may be plausible if you are interested in measurements counted in milliseconds, but today dns servers tend to be very reliable by the operators that manage them. Among the best dns are undoubtedly those of CloudFlare, Google, OpenDNS, Norton ConnectSafe and Comodo Secure DNS.
And if you ever wonder: What is my dns? then you can find out through the online tool that you will find at the top of this Check DNS page. It is a form in which you can check the dns of your domain. And for the specific case of question like I want to know my dns, just by looking also at the top of this Check DNS page test, just above the form where you are going to put your domain name, you will be able to see your remote IP, the IP that corresponds to your ISP and from which you are connecting to the Internet. And through that IP address you can find out more information, according to your interest and the advanced knowledge you may have.
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