nowfound

Dev tools · June 8, 2021

Reverse IP/DNS

DNS history data repository covering billions of DNS records

Reverse IP/DNS launched on June 8, 2021 with 4 votes. The site was still online in September 2026, 5 years on.

Visit reverse-ip.whoisxmlapi.com ↗Reverse IP/DNS alternatives

What it does

Reverse IP/DNS is among the most comprehensive repositories of DNS history data, spanning 1.4 billion domains and subdomains and over 815 million IPv4 addresses. The data is available via a lookup tool, an API, or as a downloadable database updated daily.

WhoisXML API’s Reverse IP product line helps you find hidden IP connections as part of DNS asset discovery. Try it today and see what you can uncover!

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers. Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records . Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details. Access our web-based solution to dig into and monitor all domain events of interest. Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms,…from reverse-ip.whoisxmlapi.com

Does a similar job

all alternatives →
  • 4D
    4B+ DNS Records Dataset2024 · merklemap.com · ▲90

    Hi HN, I've been working on building a pipeline to create a DNS records database lately. The goal is to enable research as well as competitive landscape analysis on the internet. The dataset for now spans around 4 billion records and covers all the common DNS record types: A AAAA ANAME CAA CNAME HINFO HTTPS MX NAPTR NS PTR SOA SRV SSHFP SVCB TLSA TXT Each line in the CSV file represents a single DNS record in the following format: www.example.com,A,93.184.215.14 Let me know if you have any questions or feedback!

  • IN
    Iphistory.net – Find Historic IP Addresses from Websites and Reverse IP2024 · iphistory.net · ▲5
  • IPHistory2024 · iphistory.net · ▲4

    Find historic IP addresses from websites and reverse IP

  • A site to look up DNS records2017 · dnsrecords.io · ▲82

    DNS record lookups just as you like 'em

  • Open database tracking 77K public DNS servers every 10 minutesDec 2025 · dnsdirectory.com · ▲7

    Hey HN! We built DNS Directory (https://dnsdirectory.com), a free, searchable database of public DNS servers with live monitoring every 10 minutes. We needed to find an up-to-date list of DNS servers used by carriers around the world for a proxy fingerprinting / web-scraping project but we were shocked to find that it didn’t exist so we built it ourselves in an internal Hackathon We’re adding more features but so far we: Test 77K+ servers every ~10 minutes Allow filtering by uptime, location, security features (ad blocking, malware protection, DNSSEC) Show info on IPv6…

  • File distribution over DNS: (ab)using DNS as a CDN2023 · eighty-twenty.org · ▲72

More dev tools this month

the category →
  • /dev/null▲483

    a social network for devs

    Dev tools · 3d ago · dev-null.sh

  • Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

    open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

    Dev tools · 27d ago · github.com

  • Reladraw – A diagram language where you decide where to place things▲411

    Contribute to reladraw/reladraw development by creating an account on GitHub.

    Dev tools · 25d ago · github.com

  • OpenBot▲362

    Grok Bot alternative: free, local, open-source, multiplayer

    Dev tools · 23d ago · openbot.run

  • Talanoa▲345

    Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

    Dev tools · 20d ago · talanoa.email

  • CoreSpeed▲332

    One MCP for everything your agents need: apps, memory, tools

    Dev tools · 28d ago · corespeed.io

Source: Product Hunt launch ↗

Launched alongside, June 2021

the whole month →