DNS Lookup Online



About DNS Lookup Online

DNS Lookup Online is a browser based network tool that displays DNS records showing publicly for the domain name being queried.

DNS Lookup Online allows you to use public DNS server (Google, Cloudflare, Quad9, OpenDNS, Level3, Verisign, Comodo, Norton, Yandex, NTT, SDNS, CFIEC, Alidns, 114DNS, Hinet, etc.), Specify name server, Authoritative name server, Top-level domain name server, Root name server and other DNS servers for query. These DNS server IP addresses support IPv4 and IPv6.

Enable Advanced Mode displays the authority, additional, DNS message header, and DNS server response information for the DNS query. This can help to understand more comprehensive DNS Lookup information.

Enable DNSSEC (Domain Name System Security Extensions), DNSSEC creates a secure domain name system by adding cryptographic signatures to existing DNS records. By checking its associated signature, you can verify that a requested DNS record comes from its authoritative name server and wasn’t altered en-route, opposed to a fake record injected in a man-in-the-middle attack.


List of DNS record types

Type Defining RFC Description Function
A RFC 1035 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 RFC 3596 address record Returns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host.
AFSDB 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.
CAA RFC 6844 Certification Authority Authorization DNS Certification Authority Authorization, constraining acceptable CAs for a host/domain.
CERT RFC 4398 Certificate record Stores PKIX, SPKI, PGP, etc.
CNAME RFC 1035 Canonical name record Alias of one name to another: the DNS lookup will continue by retrying the lookup with the new name.
DHCID RFC 4701 DHCP identifier Used in conjunction with the FQDN option to DHCP.
DNAME RFC 6672 Alias for a name and all its subnames, unlike CNAME, which is an alias for only the exact name. Like a CNAME record, the DNS lookup will continue by retrying the lookup with the new name.
DNSKEY RFC 4034 DNS Key record The key record used in DNSSEC. Uses the same format as the KEY record.
DS RFC 4034 Delegation signer The record used to identify the DNSSEC signing key of a delegated zone
IPSECKEY RFC 4025 IPsec Key Key record that can be used with IPsec.
LOC RFC 1876 Location record Specifies a geographical location associated with a domain name
MX RFC 1035
RFC 7505
Mail exchange record Maps a domain name to a list of message transfer agents for that domain.
NAPTR RFC 3403 Naming Authority Pointer Allows regular-expression-based rewriting of domain names which can then be used as URIs, further domain names to lookups, etc.
NS RFC 1035 Name server record Delegates a DNS zone to use the given authoritative name servers.
NSEC RFC 4034 Next Secure record Part of DNSSEC—used to prove a name does not exist. Uses the same format as the (obsolete) NXT record.
NSEC3 RFC 5155 Next Secure record version 3 An extension to DNSSEC that allows proof of nonexistence for a name without permitting zonewalking.
NSEC3PARAM RFC 5155 NSEC3 parameters Parameter record for use with NSEC3.
PTR RFC 1035 Pointer record Pointer 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.
RP RFC 1183 Responsible Person Information about the responsible person(s) for the domain. Usually an email address with the @ replaced by a.
RRSIG RFC 4034 DNSSEC signature Signature for a DNSSEC-secured record set. Uses the same format as the SIG record.
SOA RFC 1035
RFC 2308
Start of [a zone of] authority record Specifies 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.
SRV RFC 2782 Service locator Generalized service location record, used for newer protocols instead of creating protocol-specific records such as MX.
SSHFP RFC 4255 SSH Public Key Fingerprint Resource record for publishing SSH public host key fingerprints in the DNS System, in order to aid in verifying the authenticity of the host. RFC 6594 defines ECC SSH keys and SHA-256 hashes. See the IANA SSHFP RR parameters registry for details.
TLSA RFC 6698 TLSA certificate association A record for DANE. RFC 6698 defines "The TLSA DNS resource record is used to associate a TLS server certificate or public key with the domain name where the record is found, thus forming a 'TLSA certificate association'".
TXT RFC 1035 Text record Originally for arbitrary human-readable text in a DNS record. Since the early 1990s, however, this record more often carries machine-readable data, such as specified by RFC 1464, opportunistic encryption, Sender Policy Framework, DKIM, DMARC, DNS-SD, etc.
URI RFC 7553 Uniform Resource Identifier Can be used for publishing mappings from hostnames to URIs.