Looking for KnowEm? It's offline. Here's how to run the same checks.
If you typed knowem.com and got an error, it isn't your connection. NameHound is a separate site with no connection to KnowEm or its owners; this page explains what happened as far as the public record shows, and how to do the same job now.
What the record shows
- On 2026-10-02 we asked Cloudflare's public DNS for knowem.com and got no address back, so browsers have nowhere to connect.
- The Internet Archive's last working copy of the KnowEm home page is from April 21, 2024 (archived copy).
- Its next and last capture, on April 29, 2024, shows a hosting company's "Domain does not exist" page instead of KnowEm. The Archive has no captures of the home page after that.
We don't know why it closed and won't guess. If it comes back, we'll update this page.
What KnowEm did
The April 2024 copy of its home page said it could search "over 500 popular social networks, over 150 domain names, and the entire USPTO Trademark Database." It also sold a paid service that set up profiles on your behalf on 25 to 300 social sites.
How to do the same three checks today
1. Usernames
Our checker asks the platforms that offer an official lookup (Bluesky, Mastodon, GitHub, GitLab, npm and PyPI now; YouTube, Twitch and Steam soon) and gives you one-click links for the rest: Instagram, Facebook, TikTok, X, Threads, LinkedIn, Pinterest, Snapchat, Reddit, Medium, Substack, Telegram and Product Hunt.
That's far fewer automatic checks than 500, on purpose. Several big platforms forbid automated lookups in their terms, and a checker that ignores that can be blocked or wrong without telling you. A list of links you open yourself is slower but the answer comes straight from the platform. How it works quotes each platform's terms.
Most people only need the platforms they'll actually post on. Five to ten names checked properly beat 500 checked badly.
2. Domains
The checker looks up .com and ten other endings through RDAP, the system ICANN describes as "the replacement for the WHOIS protocol" (ICANN). For endings whose registries aren't in the public RDAP directory, like .io and .co, it links to a registrar search.
3. Trademarks
Use the free USPTO Trademark Search. Look for marks that sound or look like yours, not only exact matches, and note what goods or services they cover. The USPTO explains why both matter on its likelihood of confusion page. Our score asks what you found; it isn't legal advice, and a trademark attorney should check before you file.
What we don't do
We don't create accounts for you, and we don't sell a profile-setup service. Claim each handle yourself, through each platform's normal sign-up, so the account is in your name from day one.