Is your site up? 371+ popular domains checked — HTTP, SSL, DNS (2026)

Q: Can I request a domain be added?

Yes — visit /check/ and a suggestion form appears when the domain is not yet whitelisted. Requests are reviewed within 24–48 hours.

Q: Where does the data come from?

All reports come from HTTPS probes performed by our own servers. No third-party scraping, no shared databases.

Igor Verentsov

Website uptime check

Pre-run HTTP, SSL and DNS reports for the most-visited domains. Search any site or pick one from the list.

371 domains checked

780ms avg response

3 h last update

Popular categories

Big Tech 8/8

G google.com 195 ms A

A apple.com 210 ms A+

M microsoft.com 633 ms A

A amazon.com 897 ms A+

G github.com 293 ms A+

C cloudflare.com 1,264 ms A

W wikipedia.org 1,011 ms B

N netflix.com 219 ms B

Developer → 7/8

G github.com 293 ms A+

S stackoverflow.com 252 ms B

G gitlab.com 448 ms A

N npmjs.com 207 ms B

D docker.com 293 ms A+ php.net not checked

P python.org 180 ms A+

N nodejs.org 424 ms A

Cloud & SaaS → 5/8

C cloudflare.com 1,264 ms A

V vercel.com 220 ms A+

N netlify.com 412 ms A digitalocean.com not checked

S stripe.com 470 ms A+

F figma.com 803 ms A+ notion.so not checked slack.com not checked

E-commerce → 8/8

A amazon.com 897 ms A+

A aliexpress.com 937 ms A

E ebay.com 566 ms C

S shopify.com 251 ms A

E etsy.com 4,244 ms D

W walmart.com 340 ms A+

T target.com 219 ms B

A alibaba.com 1,121 ms B

News → 5/8

bbc.com not checked nytimes.com not checked

T theguardian.com 432 ms A+

R reuters.com 988 ms C

B bloomberg.com 644 ms C

F forbes.com 691 ms A+

T techcrunch.com 156 ms A+ wired.com not checked

Fintech → 2/8

S stripe.com 470 ms A+

P paypal.com 1,035 ms B square.com not checked adyen.com not checked paddle.com not checked braintree.com not checked mollie.com not checked chargebee.com not checked

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Showing top 100 of 371 cached domains. Results refreshed nightly.

Frequently asked

What is a website check?

A website check probes a domain over HTTPS and reports status code, response time, SSL certificate validity, DNS records and security header posture. Enterno.io runs such checks automatically for 371+ curated domains and makes the cached reports available under /check/<domain>.

How often are reports refreshed?

Our background probe re-checks every curated domain every six hours. Results you see on the hub reflect the most recent probe; the history sparkline on each /check/<domain> page shows the last 30 checks.

What do grades A+ / A / B / C / D / F mean?

We compute a composite grade from HTTP status, response time, and the three core security headers (HSTS, CSP, X-Frame-Options). Full rubric: 95+ = A+, 85+ = A, 70+ = B, 55+ = C, 40+ = D, else F. Unreachable or 5xx responses hard-fail to F.

Can I request a domain be added?

Yes — visit /check/<any-domain> and the suggestion form appears if the domain is not yet on our whitelist. We review requests within 24–48 hours.

Is this free?

Browsing the catalog and every /check/<domain> report is free with no signup. For monitoring your own sites with alerts, see our pricing page.

Where does the data come from?

All reports are generated by Enterno.io infrastructure using standard HTTPS probes from our own servers. No third-party scraping, no shared databases.

About this catalog

Curated, not crawled

Only manually whitelisted domains get a public page. This keeps the catalog focused on sites that matter to real users instead of diluting it with random SEO-bait URLs.

Real probes, not scraped data

Every report comes from an HTTPS probe performed by our own infrastructure — we measure the actual server behaviour, not what was reported somewhere else six months ago.

History included

Every /check/<domain> page shows the last 30 checks as a tile row so you can see whether a site has been stable or flaky recently — at a glance, no signup.

No tracking, no login

Browsing the catalog requires no account and sets no tracking cookies. All data is public by design — share any /check/<domain> URL with anyone.