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DNS रिकॉर्ड

DNS रिकॉर्ड प्रकार खोजें और जानें — उदाहरण, उपयोग का समय, RFC संदर्भ

DNS रिकॉर्ड प्रकारों के लिए संदर्भ। प्रत्येक प्रविष्टि में एक विवरण, उदाहरण zone-file सिंटैक्स और इसे कब उपयोग करना है इसकी टिप्पणियाँ हैं।

14 रिकॉर्ड प्रकार
A
Address (IPv4)RFC 1035

Maps a hostname to a 32-bit IPv4 address.

उदाहरण

example.com.    300    IN  A    93.184.216.34

कब उपयोग करें

Standard hostname → IPv4 mapping. Most websites have at least one A record.

AAAA
Address (IPv6)RFC 3596

Maps a hostname to a 128-bit IPv6 address.

उदाहरण

example.com.    300    IN  AAAA  2606:2800:220:1:248:1893:25c8:1946

कब उपयोग करें

IPv6 endpoint resolution. Modern dual-stack deployments include both A and AAAA.

CNAME
Canonical NameRFC 1035

Alias of one hostname to another. The DNS lookup follows the alias.

उदाहरण

www.example.com.   300   IN  CNAME  example.com.

कब उपयोग करें

Pointing subdomains (www, app) to a primary host. Cannot coexist with other records on the same name.

MX
Mail ExchangeRFC 1035

Specifies mail servers for a domain, with a priority value.

उदाहरण

example.com.    300    IN  MX    10 mail.example.com.

कब उपयोग करें

Required for receiving email. Lower priority = higher preference.

TXT
पाठRFC 1035

Arbitrary text strings. Used for verification and policy declarations.

उदाहरण

example.com.    300    IN  TXT   "v=spf1 include:_spf.google.com ~all"

कब उपयोग करें

SPF/DKIM/DMARC email auth, domain verification (Google/Facebook), public keys.

NS
Name ServerRFC 1035

Delegates a DNS zone to authoritative name servers.

उदाहरण

example.com.    300    IN  NS    ns1.example.com.

कब उपयोग करें

Required at the apex of every zone. Lists which servers answer queries for this domain.

SOA
Start of AuthorityRFC 1035

Authoritative info about the zone: primary NS, admin email, serial, timers.

उदाहरण

example.com.   3600   IN  SOA   ns1.example.com. admin.example.com. 2026050701 7200 3600 1209600 3600

कब उपयोग करें

Exactly one per zone, at the apex. Required by DNS spec.

SRV
Service LocatorRFC 2782

Specifies the host/port for a service — protocol, weight, priority.

उदाहरण

_sip._tcp.example.com. 300 IN SRV 10 60 5060 sipserver.example.com.

कब उपयोग करें

SIP/XMPP/LDAP/Minecraft service discovery. Format: _service._proto.name.

CAA
Certification Authority AuthorizationRFC 8659

Restricts which CAs can issue TLS certificates for the domain.

उदाहरण

example.com.   300    IN  CAA   0 issue "letsencrypt.org"

कब उपयोग करें

Prevent unauthorized CAs from issuing certs for your domain. Recommended for security.

PTR
Pointer (Reverse DNS)RFC 1035

Maps an IP address back to a hostname (in in-addr.arpa or ip6.arpa).

उदाहरण

34.216.184.93.in-addr.arpa.  300  IN  PTR  example.com.

कब उपयोग करें

Reverse DNS for email server reputation (spam filters), logging.

HTTPS
HTTPS Service BindingRFC 9460

Encrypted ALPN/SNI hints for HTTPS connections; supports ECH.

उदाहरण

example.com.   300    IN  HTTPS  1 . alpn="h3,h2"

कब उपयोग करें

Modern HTTPS optimization (HTTP/3 hint, encrypted client hello). Browser support growing.

SVCB
Service BindingRFC 9460

Generic service binding (HTTPS is a specific subtype).

उदाहरण

_dns.example.com. 300 IN SVCB 1 dns.example.com. alpn="dot"

कब उपयोग करें

Generic service alias with hints (e.g., DNS over TLS). Less common than HTTPS.

DS
Delegation SignerRFC 4034

DNSSEC — fingerprint of child zone's KSK, stored in parent zone.

उदाहरण

example.com. 86400 IN DS 12345 13 2 ABC123...

कब उपयोग करें

DNSSEC chain of trust. Required when a zone is DNSSEC-signed.

DNSKEY
DNS Public KeyRFC 4034

DNSSEC — public key for verifying signatures in the zone.

उदाहरण

example.com. 86400 IN DNSKEY 257 3 13 ABC456...

कब उपयोग करें

DNSSEC verification. Stored at zone apex; signed by KSK referenced by parent's DS.

कैसे उपयोग करें

  1. Type a record type, keyword, or use case into the search field (e.g. "MX", "mail", "DNSSEC").
  2. Browse the matching cards, each showing the record type badge, full name, RFC reference, description, a concrete example, and when to use it.
  3. Leave the field empty to see all 14 record types at once.

उदाहरण

  • Searching "MX" shows the Mail Exchanger record, RFC 1035, with example "example.com. IN MX 10 mail.example.com." and explains it is used to route email for a domain.
  • Searching "DNSSEC" returns DS and RRSIG cards explaining how DNS responses are cryptographically signed.

उत्पादन में उपयोग से पहले आउटपुट सत्यापित करें। कोई वारंटी नहीं — देखें शर्तें.