Top all-time · #2841
DomainTools
Company blog · domaintools.com/resources/blogsecuritydata
DomainTools is the company blog at domaintools.com, writing about security and data. Since 2008, 26 different Hacker News readers have linked it 32 times. It is still writing: the last post was on 2026-10-13, and you can follow it by feed.
Too few sampled comments (26) to say how often HN recommends it.?
Why HN links it
HN readers link DomainTools mainly as a domain and DNS research tool, citing WHOIS history, reverse IP lookups and passive DNS. A few links point to its DNS security blog posts.
Summarised by Claude from a sample of 26 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
DomainTools provides DNS-based threat intelligence covering 97% of internet infrastructure. Detect, investigate & block malicious domains. Request a demo.
Most-linked posts?
- /3 people · 3 mentions · first linked 2011-01-16
- /company/join-our-team/2 people · 2 mentions · first linked 2021-05-04
- /research/ip-explorer/?ip=65.222.202.532 people · 2 mentions · first linked 2013-08-05
- /2 people · 2 mentions · first linked 2017-03-29
What Hacker News says?
No and No. I'm talking about a hypothetical ISP that wants to extract all the hostnames its customers are connecting to. It has to analyze the traffic off a live stream and re-construct the TCP stream to do this. Rebuilding the TCP stream on a 100Gbps switch is pretty hard to do. Something like "sniproxy" is only extracting the hostname for all traffic connecting to it, so it doesn't have to try and re-build the tcp…
Comment linking /
on “The House just voted to wipe out the FCC’s landmark Internet privacy protections”Submitted The Use Cases and Benefits of SVCB and HTTPS DNS Record Types as a story · 3 points
HN discussionDomainTools | Engineering & Operations | REMOTE (North America) | Full-time | https://www.domaintools.com/company/join-our-team#open-posit... DomainTools (domaintools.com) is hiring for multiple positions. We’re a mid-sized security company whose goal is to make the internet a safer place. Our part of that (enormous) job is knowing everything we can know about the Internet’s DNS (where domains resolve, who registere…
Comment linking /company/join-our-team
on “Ask HN: Who is hiring? (May 2022)”Submitted How do you define the “top” domain names on the internet? as a story · 2 points
HN discussionI use this and it's free and so far it's worked pretty quickly when I renew/transfer a domain intentionally : http://www.domaintools.com/monitor/domain-monitor/
Comment linking /monitor/domain-monitor/
on “This Site’s Domain is Stolen”Submitted Parasitic Computing Implemented (2018) as a story · 1 points
HN discussionDomainTools (domaintools.com)| REMOTE US | security company monitoring the Internet's DNS (i.e. we track every domain on the internet) and other Internet-facing security & intelligence information. We're hiring on our backend team, helping to collect and organize the internet's information. Senior Software Engineer on the Cloud & DevOps Platform team, to join the team that builds & supports the underlying system we…
Comment linking /company/join-our-team/
on “Ask HN: Who is hiring? (May 2021)”DomainTools | Engineering & Operations | REMOTE | Full-time | https://www.domaintools.com/company/join-our-team/#open-posi ... DomainTools (domaintools.com) is hiring for multiple positions. We’re a mid-sized security company whose goal is to make the internet a safer place. Our part of that (enormous) job is knowing everything we can know about the Internet’s DNS (where domains resolve, who registered them, etc), t…
Comment linking /company/join-our-team/
on “Ask HN: Who is hiring? (March 2022)”you also have zone walking with DNS NSEC https://www.domaintools.com/resources/blog/zone-walking-zone...
Comment linking /resources/blog/zone-walking-zone-enumeration-via-dnssec-nsec-records/
on “Ask HN: How did the internet discover my subdomain?”The form thread relies on a domaintools.com query [1], which points to "SCIENCE APPLICATIONS INT" [2] as the owner of this 65.222.202.53 Class C subset (65.222.202.53 has found in the updatify() function listed below [3]). You might recognize SAIC from the NSA's 'XKEYSCORE Systems Engineer' job posting thread [4] a couple days ago. function updatify() { var iframe = document.createElement('iframe'); iframe.style.dis…
Comment linking /research/ip-explorer/?ip=65.222.202.53
on “Torsploit takedown: analysis, reverse engineering, forensic”The is website seems slow right now. Alternative link on ars: http://arstechnica.com/tech-policy/2013/08/researchers-say-t... Relevant links: http://www.domaintools.com/research/ip-explorer/?ip=65.222.2... http://pop.robtex.com/nsa.gov.html#records
Comment linking /research/ip-explorer/?ip=65.222.202.53
on “Torsploit takedown: analysis, reverse engineering, forensic”DomainTools | Engineering & Operations | REMOTE | Full-time | https://www.domaintools.com/company/join-our-team/#open-posi... DomainTools (domaintools.com) is hiring for multiple positions. We’re a mid-sized security company whose goal is to make the internet a safer place. Our part of that (enormous) job is knowing everything we can know about the Internet’s DNS (where domains resolve, who registered them, etc), to…
Comment linking /company/join-our-team/
on “Ask HN: Who is hiring? (February 2022)”So has Domaintools ( http://domaintools.com ) but both are expensive (Domaintools in particular is very expensive) whereas DNSTrails appears to be free unless you want API access.
Comment linking /
on “Find every domain someone owns automatically”I'm afraid this doesn't stack up well to the existing tools our there. Here's a comparison of your results with the tool I use most often when searching for a domain: http://www.leandomainsearch.com/search?q=big+daddy http://www.domaintools.com/buy/domain-suggestions/?q=big+dad... Domaintools' name spinner just gives better results, and immediately tells me about availability for all the .tlds as well. So I guess st…
Comment linking /buy/domain-suggestions/?q=big+daddy
on “Review my startup - Lean Domain Search: The fastest way to find a domain name”So will firms like https://www.domaintools.com/ need to redact their whois history data? They're in Seattle, for whatever that's worth.
Comment linking /
on “WHOIS blackout period likely starting in May”Neat! How is this different than domaintools/farsight [1]? Passive DNS [2] has been in my toolbox for 15+ years, and is invaluable for security research / threat intelligence. Knowing historical resolutions to something are so helpful in investigations. For anyone interested, they should check out the talk by one of the DomainTools people [3] on how it can be utilized for investigation. Are you passively collecting…
Comment linking /products/threat-intelligence-feeds/domain-visibility/farsight-nad/
on “Show HN: 4B+ DNS Records Dataset”unfuddle.com ... free git/svn hosting and ticketing. domaintools - domain monitor for stalking that domain that you absolutely have to have http://www.domaintools.com/monitor/
Comment linking /monitor/
on “We’re creating a “Startup toolbox”. What apps should go in it?”Maybe it's possible to use a paid service like this: http://www.domaintools.com/research/reverse-ip/?hostname=107...
Comment linking /research/reverse-ip/?hostname=107.22.239.87
on “New Stanford course - Anatomy”A screen of their website: http://www.domaintools.com/research/screenshot-history/secur...
Comment linking /research/screenshot-history/secureinvestment.com/
on “Forex Investors May Face $1B Loss as Trade Site Vanishes”Yeah, for a fee, you can find historical registration info and other goodies: http://www.domaintools.com/
Comment linking /
on “Is Gmail Safe? How do you protect yourself from these kind of attacks? ”Could probably find the domain for $200 =) http://www.domaintools.com/reverse-whois/?email=ac6994646bd3...
Comment linking /reverse-whois/?email=ac6994646bd33eb9b5a6c2d4e023fb7a
on “Hacking side projects: Napkin to $1000 per day”No anti-virus tooling caught this compromise, nothing in the Microsoft sales-pitch caught it either. In fact, Microsoft itself was compromised. FireEye caught the compromise only because $Attacker went a little too far. So one big lesson for any software shop that claims to be professional is to verify builds. It's clear that SloppyWinds is/was completely incompetent. Whoever executed this compromise left nothing be…
Comment linking /resources/blog/unraveling-network-infrastructure-linked-to-the-solarwinds-hack
on “Russia's SolarWinds Attack”Anybody care to explain the values in that chart? It says there are 332,395 level 2 domains under .net and 2,705,157 under .com. Perhaps the chart is quite old? E.g. http://www.domaintools.com/internet-statistics/ gives different values: 13,100,186 registered .net domains and 87,707,437 .com domains. In any case, I think .com clearly outweighs .net in terms of registered domains. Hostnames don't really matter anythi…
Comment linking /internet-statistics/
on “Most popular domains: .net bigger than .com”I said $300, and I never heard back from him. If I want to use the name, do you have any suggestions? Bid more than $300? If you don't know how much the domain is worth, you should do some homework. Here are a couple of sites I've used when attempting to determine the market value of a domain: http://www.domaintools.com/buy/sales-history/ http://www.domain-prices.com/search/prices/5000
Comment linking /buy/sales-history/
on “Ask HN: Obtain a domain from a squatter by trademarking”http://domaintools.com
Comment linking /
on “Ask HN: What domain/name suggestion tools do you use?”Check out Tranco [1], which uses Cisco Umbrella, Majestic and also now a list sourced from Farsight passive DNS [2]. They're "working on" adding Chrome UX and Cloudflare Radar. There's also a list from Netcraft [3]. [1] https://tranco-list.eu/ [2] https://www.domaintools.com/resources/blog/mirror-mirror-on-... [3] https://trends.netcraft.com/topsites
Comment linking /resources/blog/mirror-mirror-on-the-wall-whos-the-fairest-website-of-them-all/
on “How to crawl a quarter billion webpages in 40 hours (2012)”http://domaintools.com
Comment linking /
on “Good tools to search for domain names”http://www.domaintools.com/research/whois-history/ looks like what you want, but it looks like a sign up is required, but there is a free 7 day trial. Are you looking for something totally free?
Comment linking /research/whois-history/
on “Ask HN: How to track complete domain ownership history”You have no content at all. You need content which is accessible to the user and search engine before logging in. Use this tool to see what the search spider see's. http://www.domaintools.com/seo-browser/ There's not much there. You may want to start by searching for the basics of SEO, maybe a 'beginners checklist' of sorts. It will most likely prove very handy. Focus on your on-page factors first, as those are the…
Comment linking /seo-browser/
on a deleted thread
