For IT teams
NTPSignal is a web app. Nothing is installed and no browser extension is needed. If your network or mail filters are strict, allowing the items below is all it takes for your team to sign in and use it.
Web domains
| Domain | What it is |
|---|---|
ntpsignal.com | This website, the app, its API, fonts and map imagery. Everything the app loads is served from here. |
ntpsignal.cloudflareaccess.com | The sign-in page. It is run by Cloudflare, which handles authentication for NTPSignal. Users are sent here when they open the app and returned to ntpsignal.com after signing in. |
HTTPS on port 443 only, TLS 1.2 or newer. Those two hosts are all the app needs. There are no third-party trackers, ads or analytics scripts on the website or in the app.
Check from this network
Press the button on the network your team uses. Your browser tries to reach each host and reports what it found; nothing is sent to us.
| Host | Result |
|---|---|
ntpsignal.com | not checked yet |
ntpsignal.cloudflareaccess.com | not checked yet |
Sign-in emails
When someone signs in with their email address, Cloudflare emails them a one-time code.
| Item | Value |
|---|---|
| Sender address | noreply@notify.cloudflare.com |
| Sender domain | notify.cloudflare.com |
| Sending IP addresses | 104.30.16.2 through 104.30.16.7 |
Email from our team comes from @ntpsignal.com addresses.
Cookies
Sign-in sets first-party cookies on ntpsignal.com and ntpsignal.cloudflareaccess.com.
If your browser policy clears cookies on exit, users will be asked to sign in again each session.
Single sign-on
Email code sign-in works for everyone. Enterprise plans can sign in through your own identity provider, such as Microsoft Entra ID, Okta or Google Workspace. Contact us to set it up.
Data and privacy
What we collect and why is in the privacy policy. Security practices and documents available on request are on the security & trust page.
Contact
Questions or a security review: security@ntpsignal.com.