Website Uptime Monitor

Monitor website availability and server information for any domain

decisionanalytics.org

Uptime & Server Information

Current Status

Status
Active
Server Type
GitHub.com
Page Title
Sequential Decision Analytics | Sequential Decision Analytics
Meta Description
Warren B. Powell - Sequential decision analytics, Professor Emeritus, Princeton University
Meta Keywords
Not available
Last Checked
just now
Last Status Change
Came back up15 days ago (8/28/2026)
Last Downtime
First seen down 4 months ago (5/7/2026), back up 15 days ago

Observed Changes

DateStatusServer
9/5/2026, 9:10:30 PMActiveGitHub.com
8/28/2026, 1:34:31 PMActiveGitHub.com
5/9/2026, 3:39:06 AMInactiveUnknown
5/7/2026, 8:29:37 PMInactiveUnknown
3/19/2026, 10:12:05 AMActiveUnknown
2/11/2026, 10:02:38 PMInactiveUnknown
2/2/2026, 3:10:44 PMInactiveUnknown
1/20/2026, 6:28:06 AMActiveLiteSpeed
1/13/2026, 10:39:06 PMInactiveUnknown
1/5/2026, 2:06:42 PMInactiveUnknown
1/1/2026, 4:11:19 AMInactiveUnknown
12/24/2025, 9:57:37 AMInactiveUnknown
11/6/2025, 8:38:59 AMActiveLiteSpeed
11/4/2025, 4:25:25 PMActiveLiteSpeed
10/22/2025, 11:59:45 PMActiveLiteSpeed

Don't just check uptime once — watch it 24/7

This is a one-time check. Turn on monitoring and we'll watch the domains that matter to you continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor uptime free

Free for your first domain: uptime, DNS, and certificate together. No credit card.

About Website Uptime Monitoring

Use the Who.is uptime information to track the availability and server information of websites. This helps track:

  • Website availability and response status
  • Server software and configuration
  • Meta information including titles and descriptions
  • Historical uptime patterns

This information is valuable for website owners, system administrators, and anyone interested in monitoring website reliability and performance.

What this page reports

  • Last status change: When we last saw a site switch between reachable and unreachable
  • Last downtime: When a site was most recently seen down, and whether it has come back
  • Server and meta information: The server software, page title and meta tags we last observed

We check a domain at most once a day and record an observation only when something changes, so these are the times a change was seen rather than the exact moment it happened. For continuous, minute-by-minute checks with alerting, use website monitoring.


Disclaimer: Who.is is not affiliated with, endorsed by, or connected to any of the domains displayed on this page. We provide this information as a public service for informational purposes only.