Website Uptime Monitor

Monitor website availability and server information for any domain

osa-opn.org

Uptime & Server Information

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Current Status

Status
Active
Server Type
Microsoft-IIS/10.0
Page Title
Optics & Photonics News - Home
Meta Description
Optics & Photonics News (OPN) is the monthly news and feature magazine published by Optica (formerly OSA). It provides in-depth coverage of recent developments in the field of optics and offers busy professionals the tools they need to succeed in the optics industry, as well as informative pieces on a variety of topics such as science and society, education, technology and business.
Meta Keywords
Not available
Most Recent Data
0 hours, 0 minutes ago

Historical Data

DateStatusServer
9/2/2026, 5:55:15 PMActiveMicrosoft-IIS/10.0
8/27/2026, 4:11:04 AMActiveMicrosoft-IIS/10.0
6/28/2026, 2:55:51 PMActiveMicrosoft-IIS/10.0
6/24/2026, 7:43:53 PMActiveMicrosoft-IIS/10.0
6/17/2026, 9:45:15 PMActiveMicrosoft-IIS/10.0
5/15/2026, 11:51:40 AMActiveMicrosoft-IIS/10.0
5/7/2026, 10:11:01 PMInactiveUnknown
4/22/2026, 11:44:40 PMActivenginx/1.28.0
3/29/2026, 10:44:53 AMInactiveUnknown
3/25/2026, 10:42:43 AMActiveMicrosoft-IIS/10.0
2/27/2026, 4:35:53 PMInactiveUnknown
1/30/2026, 1:07:27 PMInactiveUnknown
1/23/2026, 10:08:32 PMInactiveUnknown
1/13/2026, 2:36:13 AMInactiveUnknown
1/10/2026, 8:40:36 AMInactiveUnknown
1/1/2026, 3:50:40 AMInactiveUnknown
12/13/2025, 10:32:39 PMInactiveUnknown
11/10/2025, 11:13:50 PMActiveMicrosoft-IIS/10.0
10/11/2025, 9:23:08 PMActiveMicrosoft-IIS/10.0
9/8/2025, 4:47:11 AMActiveMicrosoft-IIS/10.0
6/24/2025, 11:01:43 PMActiveMicrosoft-IIS/10.0

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.

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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.

Metrics we monitor

  • Uptime percentage: The percentage of time your website is accessible
  • Response time: How quickly your server responds to requests
  • Status codes: HTTP response codes indicating server status

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.