DNS Trails

The World's Largest Repository of historical DNS data.

This is in beta, and limited at this time.
This site contains partial access to a database of roughly 2 trillion DNS records, that have been collected daily since mid-2008 (to keep the site manageable, only one day is available per month of data, so you will see 84 days of data shown per domain (one day per month for the past 7+ years), rather than the 2,500 or so collected).
I am working on finding a home for the daily historical forward DNS. Contact dns [at] rscott (dot) org for more information.

Domain Lookups:


Date is optional (use '201301231' format, which would be December 31, 2013)

Searches through our proprietary historical DNS database for DNS data on a domain (checking one date each month, the rest of the data is archived). How big is the full database? Huge. 40+ TB compressed.

The data accessible here goes back to mid-2008. It covers all .com, .net, .org, .biz, .info, .mobi, and .name domains.

IP Lookups:


Date is optional (use '201301231' format, which would be December 31, 2013). IP can use CIDR (

(IN PROGRESS, sorry) This one lets you look up an IP.

Historical Reverse DNS: go to PTRarchive.com.

If you need to contact someone regarding DNS queries from dnstrails.com,
or are looking for bulk DNS queries (e.g. for a search engine),
please E-mail info [at] dns trails.com
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