PTR Record Lookup
View Our Instructional MX Record Video
A mail exchanger record (MX record) is a type of resource record in the Domain Name
System that specifies a mail server responsible for accepting email messages on
behalf of a recipient's domain and a preference value used to prioritize mail delivery
if multiple mail servers are available. The set of MX records of a domain name specifies
how email should be routed with the Simple Mail Transfer Protocol.
View Our Instructional A Record Video
An A Record (IPv4) or AAAA (IPv6) record is an entry in your DNS Table (zone) file that
maps each domain name (e.g. domain.com) or subdomain (e.g. subdomain.domain.com)
to an IP address. In other words, the A-record tell which IP address to send the
user to for each domain or subdomain. This means that you can have different subdomains
of your website pointing to different IP addresses.
View Our Instructional CNAME Record Video
A CNAME record or Canonical Name record is a type of resource record in the Domain
Name System (DNS) that specifies that the domain name is an alias of another, canonical
domain name. This helps when running multiple services (like an FTP and a web server;
each running on different ports) from a single IP address. Each service can then
have its own entry in DNS (like ftp.example.com. and www.example.com.). Network
administrators also use CNAME Records when running multiple web servers on the same port,
with different names, on the same physical host.
View Our Instructional PTR Record Video
A PTR record is essentially the opposite of an A record. A records resolve names
to IP addresses. PTR records resolve IP addresses to names. A PTR record is also
known as reverse DNS.
View Our Instructional SPT/TXT Record Video
An SPF Record, or Sender Policy Framework (SPF), as defined in Experimental Specification RFC 4408, is an email validation system
designed to prevent email spam by tackling source address spoofing, a common vulnerability.
SPF allows administrators to specify which hosts are allowed to send email from
a given domain by creating a specific SPF record in the public Domain Name System
(DNS). Mail exchangers then use the DNS to check that mail from a given domain is
being sent by a host sanctioned by that domain's administrators.
View Our Instructional NS Record Video
An NS Record is used to define Name Servers that are responsible for the domain name records. Every domain name is required
to have a primary name server (only one), and at least one secondary name server.
This is to help ensure that all domains are reachable.