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Tldx – CLI tool for fast domain name discovery

2025-06-014:299033github.com

Domain Availability Research Tool. Contribute to brandonyoungdev/tldx development by creating an account on GitHub.

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Brandutchmen

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  • By Brandutchmen 2025-06-014:291 reply

    I’m always building small tools for myself that end up buried in private repos. I figured it was time to start sharing a few that others might find useful.

    Just published tldx, a CLI tool I use to quickly check if a domain name is available across a bunch of TLDs and variations.

    Hopefully, some of you CLI enthusiasts can find it useful!

    • By cranberryturkey 2025-06-014:571 reply

      need --suggest "..." --max 100

      • By Brandutchmen 2025-06-015:031 reply

        I'm wanting to add something like this.

        Besides length, what would you think would be a good way to sort suggestions here?

        • By cranberryturkey 2025-06-015:101 reply

          just alphabetically easier to read imo

          • By Brandutchmen 2025-06-015:271 reply

            good suggestion

            Currently, it just streams out whichever whois servers respond first. Sorting is a good improvement!

            • By cranberryturkey 2025-06-016:071 reply

              Agreed. I’d provide two lists both sorted. First a list of taken then a list of available.

              • By Brandutchmen 2025-06-017:062 reply

                I wonder if it'll be good to go from a line-by-line print to an actual TUI. That'd make sorting + dynamically inserting new domains make sense

                • By dayjah 2025-06-0117:34

                  Great tool! Prior me is sad this didn’t exist!

                  I’d be fine with a live summary status updating showing # available and # taken. Hitting ctrl+c resulting in printing the lists as above.

                  Also perhaps a —timeout flag, or similar as I may only want to wait 5 minutes / length of time it takes to steep tea for answers.

                • By cranberryturkey 2025-06-0123:32

                  i'd rather be able to pipe the results to a domains.txt file to be honest.

  • By noperator 2025-06-0113:181 reply

    You can also use https://github.com/noperator/raink to brainstorm TLDs that are relevant to some topic you care about. For example:

        curl -s https://data.iana.org/TLD/tlds-alpha-by-domain.txt |
        raink -f /dev/stdin -p 'which of these TLDs is most related to the concept of "hacking"?' |
        jq -r 'map(.value)[:10]'
    
    [
      "BLACK",
      "COMSEC",
      "TOOLS",
      "SECURITY",
      "ZERO",
      "EXPOSED",
      "FORUM",
      "SHELL",
      "BOT",
      "SOFTWARE"
    ]
    Those are all in the IANA list but not all can be registered—just showing as PoC. See https://bishopfox.com/blog/raink-llms-document-ranking for more background.

  • By a_dabbler 2025-06-0111:143 reply

    You should consider adding DNS checks prior to WHOIS. Whois is unreliable and you can be quickly blocked, doing a quick SOA DNS request can help reduce your WHOIS queries when the domain definitely exists (no SOA is not enough to confirm domain is unregistered but existing SOA is enough to confirm a domain is registered)

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