DNS Lookup: Global DNS Propagation Checker
DNS search (or DNS lookup) is the automated process of translating a human-readable domain name (like check-host.cc) into a machine-readable IP address (34.36.183.77). This system acts as the "internet's phonebook," allowing devices to find and connect to websites and services globally.
Supported DNS Record Types
Select a specific record type below to perform a dedicated global propagation test.
| Record Type | Description |
|---|---|
| A / AAAA | Tests both IPv4 (A) and IPv6 (AAAA) resolution simultaneously. |
| A | Points a domain name to an IPv4 address. Most common for basic website traffic. |
| AAAA | Points a domain name to an IPv6 address, essential for modern network compatibility. |
| CNAME | An "Alias" record that points one domain to another domain (e.g., pointing a subdomain to a root domain). |
| MX | Mail Exchange record; directs email traffic to the specific servers responsible for receiving messages. |
| NS | Indicates which Name Servers are authoritative for the domain, telling the internet where to find the domain's settings. |
| TXT | Allows admins to insert text into the DNS. Primarily used for SPF, DKIM, and DMARC to prevent email spoofing. |
| PTR | Pointer record used for Reverse DNS (rDNS) lookups, mapping an IP address back to a hostname. |
| SOA | Start of Authority record containing core administrative information about the zone. |
| SPF | Sender Policy Framework record used to specify authorized mail servers (deprecated, use TXT). |
| SRV | Service record specifying the hostname and port number for specific internet services. |
| CAA | Certification Authority Authorization record dictating which authorities can issue SSL certs. |
| DNSKEY | Contains the public signing key for DNSSEC to verify the authenticity of DNS records. |
| EDNS | Extension mechanisms for DNS, providing additional features and larger UDP packet sizes. |
| AXFR | Zone transfer request used to replicate DNS records across primary and secondary name servers. |
| MAILB | Mailbox-related record (historical) for specifying a mailbox. |
| MAILA | Mailbox-related record (historical) for mail routing. |
| MD | Mail Destination record (obsolete, replaced by MX). |
| MF | Mail Forwarder record (obsolete, replaced by MX). |
| MB | Mailbox Domain name record (experimental). |
| MG | Mail Group member record (experimental). |
| MR | Mail Rename domain name record (experimental). |
| NULL | Null record used for testing and experimental extensions. |
| WKS | Well Known Service description record (obsolete). |
| MINFO | Mailbox or mail list information record. |