Use our DNS check to verify DNS domains and get a result of Lookup of the data obtained
Query the configuration of a Domain and its DNS records
When you visit a web page, such as www.google.com, you’re not directly accessing a server with that name. In reality, you are using a system called the Domain Name System (DNS) that translates names easy to remember (as google.com) in IP addresses, which are the true addresses of the servers on the Internet. This process is essential so you can navigate the web without the need to memorize long strings of numbers.
What is a DNS LookUp
A DNS Lookup , such as ours, it is a tool that allows you to check the DNS records for a domain. It is like asking the DNS system how it is configured this domain name and get a list with all the information.
Why use a DNS Lookup?
- Check if a domain is pointed correctly to a server.
- Verify e-mail settings (MX records).
- Diagnose problems accessing a web site.
- Review security settings (such as TXT records).
Basic concepts
- Domain:
it Is the unique name that identifies a website on the Internet, asexample.com. It is easier to remember domain names to IP addresses, which are numbers such as192.168.1.1. - DNS (Domain Name System):
it Is like the phone book of the Internet. When you type a domain in your browser, DNS translates the name to the IP address of the server hosting the page. - DNS records:
Are the settings that define how a domain should behave, and how to connect its associated services (web, email, etc). Each record type has a specific function.
Types of records most common on which to perform a DNS Check or Lookup
- A (Address): Translates a domain to an IP address (IPv4). For example,
example.comyou could point it to192.168.1.1. - AAAA (Address): Similar to the A record, but for IPv6 addresses, which are longer and more modern.
- CNAME (Canonical Name): Redirect a domain to another domain. For example,
www.example.comyou can redirect toexample.com. - MX (Mail Exchange): it Defines the servers are responsible for receiving emails for the domain.
- TXT (Text): Stores additional information in the form of text, such as checks for services, such as Google or security settings (SPF, DKIM).
- NS (Name Server): Indicates which DNS servers are authorized to manage the domain.
- PTR (Pointer): Works the other way around of a record A. Translates an IP address into a domain name.
- SPF is a type of DNS record that defines which servers are authorized to send emails on behalf of a domain.
- DKIM is another security measure that adds a digital signature to emails sent from your domain.
Importance of SPF records and DKIM for sending secure email
SPF record (Sender Policy Framework)
The registry SPF is a type of DNS record that defines which servers are authorized to send emails on behalf of a domain. Your main objective is to prevent the forgery of e-mail addresses (spoofing) , a technique used in phishing attacks, and spam.
How to work the SPF records
- When a mail server receives an email, check the SPF record of the sender domain.
- Checks if the server that sent the email is authorized according to the configuration of the SPF record.
- If not authorized, the email may be marked as spam or rejected.
Log DKIM (DomainKeys Identified Mail)
The registry DKIM is another security measure that adds a digital signature to emails sent from your domain. This allows the receiving server to verify that the message was not altered during shipping and that it comes from an authorized source.
How to work the records DKIM
- The domain of the sender adds a digital signature unique to the header of the mail before you send it.
- The public key used to verify this signature is stored in a record DKIM in DNS for the domain.
- The receiving server uses this public key to confirm the authenticity of the mail.
Frequently asked questions about DNS Lookup DNS records and
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