DNS Record Lookup
Check the DNS records of a domain name
Features
Supports 8 record types
Select and retrieve A, MX, TXT, NS, CNAME, and more
Batch check up to 10 domains
Look up multiple line-separated entries in parallel to save time
Specify the DNS server to query
Specify any DNS server IP to retrieve the answer
Supports reverse lookup from an IP
Enter an IP address to retrieve the host name from the PTR record
How to use
Enter the domain name or IP
Enter the domain name or IP address to check, specifying up to 10 entries at once, separated by line breaks
Select the record types
Check only the types you want to retrieve, and optionally specify the IP of the server to query in the DNS server field
Run the lookup with the Check button
Press the Check button to query DNS on the server side and display results for each domain
Review and copy the record values
Open the accordion for each domain and copy each record value with the copy button
Use cases
Checking propagation after a server migration
After changing settings, check periodically while waiting for the new values to take effect
Investigating mail delivery failures
Inspect MX and TXT records, including SPF, for misconfigurations or omissions
Isolating issues during a site outage
When a site won't load, verify name resolution to determine whether DNS is the cause
Routine inspection of domain settings
Look up the NS and CNAME records of multiple domains together to detect unintended changes
Investigating suspicious access sources
Reverse-lookup an IP address found in logs to identify the host name of the source
Basic Knowledge
What is DNS Propagation (Waiting for Updates)?
DNS configuration changes don't take effect immediately because cache DNS servers worldwide continue to serve old responses for the duration of the TTL (Time To Live, the cache validity period). This is colloquially called "propagation," but it's actually the phenomenon of each server's cache expiring one by one.
Common Types of DNS Records
- A Record：An A record is a DNS record that maps a domain name to an IPv4 address, indicating which server hosts the site.
- MX Record：An MX record is a DNS record that specifies which server will receive email for that domain, with priority levels assigned.
- TXT Record：A TXT record is a DNS record that can contain arbitrary text and is used for sender domain authentication such as SPF and for verifying site ownership.
How to Check Propagation Faster
By querying the authoritative DNS server that manages the domain directly, bypassing the cache, you can verify whether the configuration change has taken effect without waiting for propagation.
Safety and privacy
Server-side processing
Input is processed on the server; only information necessary for the inquiry is sent.
Temporary processing only
For DNS record lookups, temporary processing occurs on the server, then data is discarded after results are returned.
Communications encrypted with HTTPS
All sent and received data is encrypted by TLS and cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
Sent only to DNS servers
The domain or IP you enter is sent only to DNS servers for record lookups.
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Updates
- update #63
Support domains starting with underscore in DNS record checker
Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
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Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.