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From Wikipedia






AAddress Record Returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host,but it is also used for DNSBLs, storing subnet masks in RFC 1101, etc.
CNAME Canonical Name RecordAlias of one name to another: the DNS lookup will continue by retrying the lookup with the new name.
MXMail Exchange RecordMaps a domain name to a list of message transfer agents for that domain
 AAAAIPv6 Address RecordReturns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host.
TXTText RecordOriginally for arbitrary human-readable text in a DNS record. Since the early 1990s, however, this record more often carriesmachine-readable data, such as specified by RFC 1464, opportunistic encryption, Sender Policy Framework, DKIM, DMARC,  DNS-SD, etc.
PTRPointer RecordPointer to a canonical name. Unlike a CNAME, DNS processing stops and just the name is returned. The most common use is for implementing reverse DNS lookups, but other uses include such things as DNS-SD.
SRVService locatorGeneralized service location record, used for newer protocols instead of creating protocol-specific records such as MX.
SPFSender Policy FrameworkSPF(99) (from RFC 4408) was specified as part of the Sender Policy Framework protocol as an alternative to storing SPF data in TXT records, using the same format. It was later found that the majority of SPF deployments lack proper support for this record type, and support for it was discontinued in RFC 7208.
NSName Server recordDelegates a DNS zone to use the given authoritative name servers
SOAStart of [a zone of] Authority RecordSpecifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.



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