Type of resource record in the Domain Name System (DNS)
For RTCP CNAME records, see RTP Control Protocol.
A Canonical Name (CNAME) record is a type of resource record in the Domain Name System (DNS) that maps one domain name (an alias) to another (the canonical name).[1]
This can prove convenient when running multiple services (like an FTP server and a web server, each running on different ports) from a single IP address. One can, for example, use CNAME records to point ftp.example.com and www.example.com to the DNS entry for example.com, which in turn has an A record which points to the IP address. Then, if the IP address ever changes, one only has to record the change in one place within the network: in the DNS A record for example.com.
CNAME records must always point to another domain name, never directly to an IP address.
^Mockapetris, P. (November 1987). "RFC 1035 - Domain names - implementation and specification". Internet Engineering Task Force. Retrieved 16 March 2019.
A Canonical Name (CNAME) record is a type of resource record in the Domain Name System (DNS) that maps one domain name (an alias) to another (the canonical...
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 pseudo-RRs...
page's domain, but those sub-domains resolve to third-party hosts via a CNAMErecord. Since the initial URL contained a sub-domain of the current page, it...
MX records, the target in SRV records must point to hostname with an address record (A or AAAA record). Pointing to a hostname with a CNAMErecord is...
between different data formats Canonical name record (CNAMErecord), a type of Domain Name System record Canonical S-expressions, a binary encoding form...
of their websites using methods such as MetaTag verification, adding CNAMErecord to DNS entry, XML verification and Domain Connect. It contains the following...
must map directly to one or more address records (A, or AAAA) in the DNS, and must not point to any CNAMErecords. When an e-mail message is sent through...
by creating a CNAMErecord that points to a cluster of web servers. Since, currently[as of?], only a subdomain can be used in a CNAME, the same result...
granted. RFC 2317 devised a methodology to address this problem by using CNAMErecords. Reverse DNS lookups for IPv6 addresses use the special domain ip6.arpa...
lTJTgRg/EW72O1DiYVThkyCgpSYS8nmEQIDAQAB" A CNAMErecord can also be used to point at a different TXT record, for example when one organization sends email...
were unaffected. On December 19, 2013, due to the adjustment of the CNAMErecord of the domain name of Wikipedia in each language, users in mainland China...
seconds. The permuted record within the zone file includes A, AAAA and CNAMErecord, the disposition is usually done by means of round robin from a registry...
assigned one or more custom domains. This is implemented by setting a CNAMErecord on the DNS server that hosts the user's domain's zone to point at the...
address for ns.example.com www IN CNAME example.com. ; www.example.com is an alias for example.com wwwtest IN CNAME www ; wwwtest.example.com is another...
address record it requires with no further referrals. If the last name server queried did not contain authoritative data for the target of the CNAME, it would...
returns a CNAMErecord: 09580.c479.ce1.fm.radiodns.org canonical name = rdns.musicradio.com. This CNAMErecord can then be used to look up SRV records that...
DNS 'A record' may be used to advertise server support for ObsTCP (with a DNS 'CNAMErecord' providing a 'friendly' name). HTTP header records, or cached/out...
Canonical domain may refer to: CNAMErecord, loosely called a "canonical domain name" One of the simply-connected Riemann surfaces – see uniformization...
returns a DNS CNAME response. This response contains a new domain, e.g. b.cdn.csp.com, indicating dCDN and the original domain and an NS record that maps...
DNS. Free DNS typically includes facilities to manage A, MX, CNAME, TXT and NS records of the domain zone. In many cases the free services can be upgraded...
technique called CNAME cloaking, where a third-party tracking service is assigned a DNS record in the first-party origin domain (usually CNAME) so that it's...
domain name aliases (CNAME). Although not intended to be a general purpose database, DNS has been expanded over time to store records for other types of...
different machine. This can be mitigated somewhat by insistence on using CNAMErecords indicating service rather than actual machine names to refer to the...
creating a link to the program in the location DSK:DEVICE;CHAOS <cname> where <cname> was up to six letters of the contact name. Simple transactions could...
2011. Retrieved 4 January 2009. Francisco, Thomas Claburn in San. "What's CNAME of your game? This DNS-based tracking defies your browser privacy defenses"...
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