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
796ms
avg response
5 h
last update
Popular categories
Big Tech
8/8
Developer →
8/8
Cloud & SaaS →
8/8
E-commerce →
8/8
News →
7/8
Fintech →
2/8
Recently checked
- 200 zuora.com 1,650 ms 5 h ago
- 200 zoom.us 334 ms 5 h ago
- 200 zeplin.io 762 ms 5 h ago
- 200 zendesk.com 352 ms 5 h ago
- 200 zencart.com 610 ms 5 h ago
- 200 zdnet.com 1,200 ms 5 h ago
- 200 zabbix.com 567 ms 5 h ago
- 200 youtube.com 602 ms 5 h ago
- 200 yclients.com 143 ms 5 h ago
- 200 yarn.build 565 ms 5 h ago
All checked domains
google.com
github.com
discord.com
microsoft.com
habr.com
coursera.org
beget.com
aliexpress.com
vk.com
letsencrypt.org
laravel.com
kubernetes.io
jsfiddle.net
joomla.org
hetrixtools.com
heroku.com
grafana.com
gitlab.com
getbootstrap.com
forbes.com
figma.com
etsy.com
eff.org
edx.org
ebay.com
drupal.org
docker.com
digitalocean.com
datadog.com
codepen.io
cnn.com
cloudflare.com
bugsnag.com
bloomberg.com
bitbucket.org
apple.com
apache.org
angular.dev
amazon.com
alibaba.com
zoom.us
youtube.com
yclients.com
wordpress.org
wordpress.com
wix.com
wikipedia.org
walmart.com
vuejs.org
vercel.com
uptimerobot.com
udemy.com
twitch.tv
tilda.cc
theguardian.com
techcrunch.com
target.com
tailwindcss.com
svelte.dev
stripe.com
statuscake.com
stackoverflow.com
ssllabs.com
squarespace.com
spotify.com
slack.com
shopify.com
sentry.io
securityheaders.com
rubygems.org
reuters.com
regru.com
reddit.com
react.dev
pingdom.com
php.net
paypal.com
pagerduty.com
packagist.org
npmjs.com
notion.so
nodejs.org
nginx.org
nextjs.org
newrelic.com
netlify.com
netflix.com
mozilla.org
pypi.org
python.org
instagram.com
facebook.com
nytimes.com
bbc.com
fornex.com
meduza.io
lightstep.com
kotlinlang.org
klaviyo.com
keycdn.com
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.