From http://www.hscripts.com/tools/HDNT/dns-record.php
A Domain Name is a unique name that you choose for your web site. All
websites are identified only by their names called as domain names. Each
Domain name has a unique IP Address.This page helps you to find the Ip
Address for given hostname.
This tool converts the hostname to IP Address.
Types of DNS Records:
A record: Address record maps a hostname to a 32-bit IPv4 address.
AAAA record: AAAA record IPv6 address record maps a hostname to a 128-bit IPv6 address.
CNAME record: Canonical name record is an alias of one name to another.
MX record: Mail exchange record maps a domain name to a list of mail exchange servers for that domain.
PTR record: Pointer record maps an IPv4 address to the
canonical name for that host.Setting up a PTR record for a hostname in
the in-addr.arpa domain that corresponds to an IP address implements reverse DNS lookup for that address.
NS record: Name server record maps a domain name to a list of DNS servers authoritative for that domain.
SOA record Start of authority record specifies the DNS server providing authoritative information about an Internet domain.
SRV record: It is a generalized service location record.
TXT record: This record is used to implement the Sender Policy Framework.