Website Uptime Monitor
Monitor website availability and server information for any domain
904.tax
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 9/16/2026, 4:16:28 AM | Inactive | Unknown |
| 9/14/2026, 7:20:47 AM | Active | DPS/2.0.0+sha-9ac0622 |
| 6/12/2026, 3:49:58 PM | Active | DPS/2.0.0+sha-8fdf15c |
| 5/16/2026, 5:06:24 PM | Active | DPS/2.0.0+sha-78da108 |
| 4/27/2026, 7:29:19 AM | Active | DPS/2.0.0-beta+sha-ba270c7 |
| 4/19/2026, 5:33:21 PM | Active | DPS/2.0.0+sha-3ef1503 |
| 4/18/2026, 9:31:36 AM | Active | DPS/2.0.0+sha-3ef1503 |
| 3/27/2026, 7:15:56 PM | Inactive | Unknown |
| 3/5/2026, 7:09:53 AM | Active | DPS/2.0.0-beta+sha-f674e39 |
| 3/2/2026, 11:17:42 AM | Active | DPS/2.0.0-beta+sha-f674e39 |
| 2/3/2026, 2:52:44 AM | Active | DPS/2.0.0-beta+sha-42b7380 |
| 1/24/2026, 9:46:05 AM | Inactive | Unknown |
| 1/22/2026, 9:40:53 AM | Inactive | Unknown |
| 1/15/2026, 10:17:43 PM | Active | DPS/2.0.0+sha-9395948 |
| 1/14/2026, 8:32:04 AM | Inactive | Unknown |
| 1/3/2026, 4:22:58 PM | Active | DPS/2.0.0+sha-8a56eb2 |
| 12/31/2025, 11:58:58 PM | Inactive | Unknown |
| 12/29/2025, 5:36:00 PM | Inactive | Unknown |
| 12/26/2025, 9:29:43 PM | Inactive | Unknown |
| 12/11/2025, 5:39:28 PM | Active | DPS/2.0.0+sha-8a56eb2 |
| 11/18/2025, 10:48:22 AM | Active | DPS/2.0.0+sha-6e30ec3 |
| 11/12/2025, 4:11:38 AM | Active | DPS/2.0.0+sha-6e30ec3 |
| 11/6/2025, 4:51:58 AM | Active | DPS/2.0.0+sha-6e30ec3 |
| 11/4/2025, 4:03:12 PM | Active | DPS/2.0.0+sha-6e30ec3 |
| 11/3/2025, 2:32:03 PM | Active | DPS/2.0.0+sha-6e30ec3 |
| 11/2/2025, 9:15:53 AM | Active | DPS/2.0.0+sha-6e30ec3 |
| 10/31/2025, 12:09:42 PM | Inactive | Unknown |
| 10/30/2025, 3:45:32 AM | Inactive | Unknown |
| 9/16/2025, 2:18:23 AM | Active | DPS/2.0.0+sha-f59d799 |
| 8/10/2025, 10:57:45 PM | Inactive | 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.