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Welcome to PTRarchive.com

This site is responsible for the safekeeping of historical reverse DNS records. It has over 230 billion records retrieved from 2008 to the present.

We provide free access to this data. If this data is useful, please support this site by linking to it -- please don't support tools that abuse it (the site is often under DDoS by black hat tools like OWASP (Jeff Foley), sublistr, nikallass/subdomain.rb, Screetsec/Sudomy, sn0int.com).

NOTE: This site now has your browser run calculations for roughly 1 second to reduce the effects of automated usage. Better than dealing CAPTCHA and squinting to find traffic lights! If it causes troubles, email me at dns [at] rscott.org.

IP Address:   

(e.g. 199.27.181.220
or 199.27.181.220/24)
Search PTRs:   

(e.g. 'nasa')
Search ALL PTRs:   
(takes time!)

(e.g. 'nasa')
Drill Down:    (explore IP ranges) Drill Down
Your nonce difficulty: