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DNSレコードタイプの一覧

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DNSレコードタイプの一覧を以下に示す。Domain Name System(DNS)のゾーンファイル英語版内のリソースレコード(RR)の概要である。 また、擬似RR(pseudo-RRs)を含んでいる。

リソースレコード

さらに見る タイプ, 値 (10進) ...
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他のタイプの擬似リソースレコード

さらに見る コード, 番号 ...
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廃止されたレコードタイプ

  • Obsoleted by RFC 973: MD(3), MF (4), MAILA (254)
  • Records to publish mailing list subscriber lists in the DNS: MB(7), MG(8), MR(9), MINFO(14), MAILB (253). The intent, as specified by RFC 883, was for MB to replace the SMTP VRFY command, MG to replace the SMTP EXPN command, and MR to replace the "551 User Not Local" SMTP error. Later, RFC 2505 recommended that both the VRFY and EXPN commands be disabled, making the use of MB and MG unlikely to ever be adopted.
  • Declared "not to be relied upon" by RFC 1123 (with further information in RFC 1127): WKS(11)[12]
  • Mistakes: NB(32), NBSTAT(33) (from RFC 1002); the numbers are now assigned to NIMLOC and SRV.
  • Obsoleted by RFC 1035: NULL(10) (RFC 883 defined "completion queries" (opcode 2 and maybe 3) which used this record, RFC 1035 later reassigned opcode 2 to be "status" and reserved opcode 3.)
  • Defined as part of early IPv6 but downgraded to experimental by RFC 3363: A6(38), Later downgraded to historic in RFC 6563.
  • Obsoleted by DNSSEC updates (RFC 3755): NXT(30). At the same time, the domain of applicability for KEY and SIG was also limited to not include DNSSEC use.
  • Part of the first version of DNSSEC (RFC 2065).
  • Not in current use by any notable application: HINFO(13), RP(17), X25(19), ISDN(20), RT(21), NSAP(22), NSAP-PTR(23), PX(26), EID(31), NIMLOC(32), ATMA(34), APL(42)
  • Defined by the Kitchen Sink internet draft, but never made it to RFC status: SINK(40)
  • A more limited early version of the LOC record: GPOS(27)
  • IANA reserved, no RFC documented them and support was removed from BIND in the early 90s: UINFO(100), UID(101), GID(102), UNSPEC(103)
  • SPF(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.[13][14]
  • RP(17) may be used for certain human-readable information regarding a different contact point for a specific host, subnet, or other domain level label separate than that used in the SOA record.
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