what are a records

List of DNS record types - Wikipedia, the free encyclopedia


** List of DNS record types **

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This *List of DNS record types* is an overview of resource records (RRs)
permissible in zone files of the Domain Name System (DNS). It also contains


· 1 Resource records
· 2 Other types and pseudo resource records
· 3 Obsolete record types
· 4 Further reading
· 5 References

*Resource records[edit]*

Type Value (decimal) Defining RFC Description Function
A 1 RFC 1035^[1] Address 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.
AAAA 28 RFC 3596^[2] IPv6 address record Returns a 128-bit IPv6 address,
most commonly used to map hostnames to an IP address of the host.
AFSDB 18 RFC 1183 AFS database record Location of database servers of an
AFS cell. This record is commonly used by AFS clients to contact AFS cells
outside their local domain. A subtype of this record is used by the
obsolete DCE/DFS file system.
APL 42 RFC 3123 Address Prefix List Specify lists of address ranges, e.g.
in CIDR format, for various address families. Experimental.
CAA 257 RFC 6844 Certification Authority Authorization DNS Certification
Authority Authorization, constraining acceptable CAs for a host/domain
CDNSKEY 60 RFC 7344 Child DNSKEY Child copy of DNSKEY record, for transfer
to parent
CDS 59 RFC 7344 Child DS Child copy of DS record, for transfer to parent
CERT 37 RFC 4398 Certificate record Stores PKIX, SPKI, PGP, etc.
CNAME 5 RFC 1035^[1] Canonical name record Alias of one name to another:
the DNS lookup will continue by retrying the lookup with the new

Source: en.wikipedia.org/wiki/List_of_DNS_record_types

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