| DNS Lookup Tool

Lookup dns records for:

Enter a domain name into the search box above to retrieve DNS records.

   _autodiscover._tcp SRV records
   Versions of Microsoft Outlook use these to locate the relevant Exchange server.

   _adsp TXT records
   Author Domain Signing Practices (Deprecated) were used to handle DKIM signed email for a domain.
   I set to "dkim=discardable" which really meant "dkim=required".

   Certificate Authority Authorisation
   This record of type TXT authorises a Certificate Authority to generate certificate for a domain.

   _dmarc TXT records are policies to indicate how to handle email that fails DKIM & SPF checks
   RFC7489 has more info if you like reading RFCs.

• MX
   Mail eXchange records indicate where to deliver email to - with some exceptions

• NS
   NameServer records are how to find the server(s) that gives you all the other records listed here

   Start Of Authority records prove the DNS is valid, in theory...

   TXT records including SPF, SenderID*, DMARC reports acceptance for a different domain, etc.
   * SenderID is NOT recommended by DRAFT (2nd) NIST Special Publication 800-177 - Trustworthy Email

   Service records. this TYPE of dns record can be used for things like AUTODISCOVER records

Other tools on this site:
Find your public IP address

Third party DNS tools:
Google DNS | IntoDNS | Kitterman's SPF Query tool

Third party DNSSEC tools:
DANETools DANE validator | NIST DANE-TEST | Verisign Labs DNSSEC Analyzer

Third party SSL test tools:
Immuniweb Free SSL Scan | Qualys SSL Labs

Last Updated 2019/05/27 11:40 CET.

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