Website Uptime Monitor
Monitor website availability and server information for any domain
book.com
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 9/15/2026, 5:05:16 AM | Active | cloudflare |
| 9/13/2026, 2:41:49 PM | Inactive | Unknown |
| 8/29/2026, 1:02:23 PM | Active | cloudflare |
| 7/27/2026, 1:51:31 AM | Active | cloudflare |
| 7/19/2026, 12:59:14 AM | Active | cloudflare |
| 7/12/2026, 9:38:17 AM | Active | cloudflare |
| 7/8/2026, 6:13:11 PM | Active | cloudflare |
| 7/5/2026, 5:05:22 AM | Active | cloudflare |
| 7/3/2026, 12:52:27 AM | Active | cloudflare |
| 6/24/2026, 9:36:29 AM | Active | cloudflare |
| 6/18/2026, 4:08:15 PM | Active | cloudflare |
| 6/14/2026, 10:09:09 AM | Active | cloudflare |
| 5/9/2026, 12:47:24 AM | Active | Unknown |
| 4/19/2026, 3:51:35 AM | Active | Unknown |
| 4/12/2026, 4:35:18 PM | Active | Unknown |
| 4/9/2026, 4:39:49 PM | Active | Unknown |
| 4/8/2026, 10:46:46 AM | Active | Unknown |
| 4/1/2026, 12:16:22 AM | Inactive | Unknown |
| 3/30/2026, 10:28:10 AM | Inactive | Unknown |
| 3/6/2026, 10:32:30 PM | Active | Unknown |
| 2/17/2026, 8:44:35 AM | Inactive | Unknown |
| 2/17/2026, 8:44:33 AM | Inactive | Unknown |
| 1/28/2026, 1:27:43 AM | Active | Unknown |
| 1/24/2026, 12:29:34 AM | Inactive | Unknown |
| 1/9/2026, 12:10:59 PM | Inactive | Unknown |
| 1/4/2026, 6:13:00 AM | Inactive | Unknown |
| 12/19/2025, 2:20:42 AM | Inactive | Unknown |
| 12/17/2025, 10:27:32 PM | Inactive | Unknown |
| 11/18/2025, 10:59:40 AM | Active | Unknown |
| 11/14/2025, 11:36:57 AM | Active | Unknown |
| 11/7/2025, 4:22:30 AM | Active | Unknown |
| 11/5/2025, 8:51:28 AM | Active | Unknown |
| 11/2/2025, 6:54:07 PM | Active | Unknown |
| 10/31/2025, 12:46:00 AM | Active | Unknown |
| 10/10/2025, 7:25:03 AM | Inactive | Unknown |
| 9/17/2025, 6:16:55 PM | Active | Unknown |
| 9/11/2025, 2:06:21 PM | Inactive | Unknown |
| 8/18/2025, 10:22:39 AM | Active | Unknown |
| 8/16/2025, 7:38:42 AM | Active | Unknown |
| 8/11/2025, 9:13:58 AM | Inactive | Unknown |
| 8/8/2025, 1:07:04 AM | Active | Unknown |
| 7/24/2025, 2:01:04 PM | Active | Unknown |
| 7/13/2025, 12:04:29 AM | Active | Unknown |
| 6/16/2025, 6:59:39 AM | Active | Unknown |
| 5/31/2025, 8:40:06 AM | Active | Unknown |
| 5/18/2025, 11:20:54 AM | Active | Unknown |
| 5/15/2025, 2:50:02 AM | Active | Unknown |
| 5/8/2025, 11:58:21 AM | Active | Unknown |
| 5/4/2025, 6:23:49 AM | Active | Unknown |
| 4/25/2025, 8:19:32 PM | Active | Unknown |
| 4/17/2025, 3:56:13 PM | Active | Unknown |
| 4/15/2025, 12:47:04 PM | Active | Unknown |
| 4/2/2025, 9:35:45 PM | Active | Unknown |
| 3/31/2025, 2:40:22 AM | Active | Unknown |
| 3/27/2025, 1:20:48 AM | Active | Unknown |
| 3/22/2025, 6:06:18 PM | Active | Unknown |
| 3/8/2025, 11:44:35 PM | Active | Unknown |
| 2/25/2025, 12:21:30 AM | Active | Unknown |
| 2/22/2025, 3:12:29 PM | Active | Unknown |
| 2/18/2025, 2:07:59 AM | Active | Unknown |
| 2/13/2025, 11:21:21 PM | Active | Unknown |
| 1/30/2025, 9:04:55 PM | Active | Unknown |
| 1/27/2025, 9:59:41 PM | Active | Unknown |
| 1/26/2025, 7:18:12 PM | Active | Unknown |
| 1/17/2025, 5:30:14 AM | Active | Unknown |
| 1/15/2025, 11:08:18 AM | Active | Unknown |
| 1/9/2025, 2:13:21 AM | Active | Unknown |
| 1/6/2025, 2:50:27 PM | Active | Unknown |
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.
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.